BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Final remarks DTSTART;VALUE=DATE-TIME:20210521T144000Z DTEND;VALUE=DATE-TIME:20210521T151000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-15082@indico.ific.uv.es DESCRIPTION:Speakers: Uli Katz (ECAP / Univ. Erlangen)\nhttps://indico.ifi c.uv.es/event/3965/contributions/15082/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/15082/ END:VEVENT BEGIN:VEVENT SUMMARY:Developments in Waveform Unfolding of PMT Signals in Future IceCub e DOMs DTSTART;VALUE=DATE-TIME:20210518T162000Z DTEND;VALUE=DATE-TIME:20210518T164000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14776@indico.ific.uv.es DESCRIPTION:Speakers: J. H. Peterson (University of Wisconsin - Madison)\n Waveform unfolding\, in which photomultiplier tube signals are expressed a s a linear combination of single-photoelectron waveforms\, is a useful pro cessing method both for analysis and for data compression in the IceCube N eutrino Observatory. This processing is currently only possible with a clu ster of computers on the surface\, but improvements in embedded technology allow moving this analysis into the digital optical modules for planned e xtensions of IceCube such as IceCube Gen2. In order to meet power constra ints\, waveform unfolding is most efficiently implemented with field progr amable gate arrays (FPGA). A non-negative least squares (NNLS) algorithm developed for use with FPGAs was modified to reproduce the results of the Lawson and Hanson algorithm that is currently used for waveform unfolding in IceCube. High Level Synthesis (HLS) tools were used to synthesize firm ware directly from C code and to implement the modified algorithm on hardw are. This talk will discuss the structure and performance of the modified NNLS algorithm that was developed\, and demonstrate what can be accomplis hed with new FPGA synthesis tools.\n\nhttps://indico.ific.uv.es/event/3965 /contributions/14776/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14776/ END:VEVENT BEGIN:VEVENT SUMMARY:Surface detectors for IceCube-Gen2 DTSTART;VALUE=DATE-TIME:20210519T170000Z DTEND;VALUE=DATE-TIME:20210519T172000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-15044@indico.ific.uv.es DESCRIPTION:Speakers: Frank Schroeder (Bartol Bartol Research Institute)\n The IceCube-Gen2 Neutrino Observatory will feature an in-ice optical array \, a larger in-ice radio detector array\, and a surface cosmic ray air sho wer array.\nThe surface array will consist of stations based on the experi ence from the planned IceTop enhancement\, each station having 4 pairs of scintillator panels\, 3 radio antennas and a central hub hosting electroni cs for data readout and time digitization.\nIn the currently proposed impl ementation\, a surface station will be located in the proximity of each of the 120 in-ice optical strings. The designed array will help to test had ronic interaction models\, will improve the measurement of cosmic ray anis otropy and will extend IceTop's measurement of the energy spectrum and mas s composition to higher energies. The array will also serve as a backgroun d veto for down-going candidate neutrino events. 
In addition\, the surf ace stations will be fundamental to characterize the atmospheric component of the in-ice spectrum(i.e. atmospheric neutrinos and muons) and may serv e as a cross calibration tool for the in-ice radio array.\nIn this present ation I will review the physics motivations for the surface array\, and ou r proposed implementation plan.\n\nhttps://indico.ific.uv.es/event/3965/co ntributions/15044/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/15044/ END:VEVENT BEGIN:VEVENT SUMMARY:KM3NeT/ARCA expectations in view of a novel multimessenger study o f starburst galaxies DTSTART;VALUE=DATE-TIME:20210519T150000Z DTEND;VALUE=DATE-TIME:20210519T152000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14879@indico.ific.uv.es DESCRIPTION:Speakers: Antonio Marinelli (INFN Naples)\nStarburst galaxies (SBGs) and more in general starforming galaxies represent a class of galax ies with a high star formation rate (up to 100 Mo/year). Despite their low luminosity\, they can be considered as guaranteed “factories” of high energy neutrinos\, being “reservoirs” of accelerated cosmic rays and hosting a high density target gas in the central region. In this contribut ion we present a novel multimessenger study of these sources and the possi bility of observing their neutrino signals with the KM3NeT/ARCA telescope. The differential sensitivity and discovery potential for different SBG sc enarios are reported considering track-like events in the 100 GeV-100 PeV energy range.\n\nhttps://indico.ific.uv.es/event/3965/contributions/14879/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14879/ END:VEVENT BEGIN:VEVENT SUMMARY:Long-baseline tagged neutrino experiments with very large volume n eutrino telescopes DTSTART;VALUE=DATE-TIME:20210521T130000Z DTEND;VALUE=DATE-TIME:20210521T133000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14787@indico.ific.uv.es DESCRIPTION:Speakers: Mathieu Perrin-Terrin (Aix Marseille Univ\, CNRS/IN2 P3\, CPPM\, Marseille\, France)\nLong-baseline neutrino experiments using very large volume neutrino telescopes\nas far detectors can collect sizeab le neutrino samples - $\\mathcal{O}(10^3) \\nu_e/year$ - even with modera te beam intensities - $\\mathcal{O}(100) kW$. The presentation will show t hat at these intensities it is possible to instrument the beam with charge d particle silicon pixel trackers to reconstruct precisely the energy\, di rection\, initial flavour and chirality of the neutrino produced in each $ \\pi^\\pm \\to \\mu^\\pm \\nu$ decay.\n\nWith proper synchronisation betwe en these trackers and the far detector\, the interacting neutrinos can be associated with the one reconstructed from the $\\pi^\\pm \\to \\mu^\\pm \\nu$ decay kinematics. The far detector is then only left with the identi fication of the oscillated neutrino flavour. This task is greatly simplifi ed by the prior knowledge of the other neutrino properties.\n\nIn such a * *tagged** long-baseline neutrino experiment\, the individual tracking of e ach neutrino of the beam from production to detection greatly reduces syst ematic uncertainties. Added to that\, the sub-percent energy resolution an d the large neutrino sample size will allow to reach unprecedented precisi on on neutrino oscillation parameters. For instance the $\\delta_{CP}$ pha se could be determined with a few degree precision across the whole $\\del ta_{CP}$ range with 10 years of data of a long-baseline tagged neutrino ex periment from U70 in Protvino\, Russia\, to a KM3NeT-ORCA like detector of fshore Toulon\, France.\n\nhttps://indico.ific.uv.es/event/3965/contributi ons/14787/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14787/ END:VEVENT BEGIN:VEVENT SUMMARY:Multi-messenger prospects with next-generation observatories DTSTART;VALUE=DATE-TIME:20210520T130000Z DTEND;VALUE=DATE-TIME:20210520T133000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14983@indico.ific.uv.es DESCRIPTION:Speakers: Markus Ahlers (Niels Bohr Institute)\nhttps://indico .ific.uv.es/event/3965/contributions/14983/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14983/ END:VEVENT BEGIN:VEVENT SUMMARY:Models of neutrino production in cosmic sources DTSTART;VALUE=DATE-TIME:20210520T133000Z DTEND;VALUE=DATE-TIME:20210520T140000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14982@indico.ific.uv.es DESCRIPTION:Speakers: Cecilia Lunardini (GWC - Arizona State University Te mpe)\nhttps://indico.ific.uv.es/event/3965/contributions/14982/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14982/ END:VEVENT BEGIN:VEVENT SUMMARY:Status of radio technique for cosmic neutrino detection DTSTART;VALUE=DATE-TIME:20210519T133000Z DTEND;VALUE=DATE-TIME:20210519T140000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14980@indico.ific.uv.es DESCRIPTION:Speakers: Abigail Vieregg (KICP - Univ. of Chicago)\nhttps://i ndico.ific.uv.es/event/3965/contributions/14980/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14980/ END:VEVENT BEGIN:VEVENT SUMMARY:The IceCube-Gen2 Neutrino Observatory DTSTART;VALUE=DATE-TIME:20210519T130000Z DTEND;VALUE=DATE-TIME:20210519T133000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14963@indico.ific.uv.es DESCRIPTION:Speakers: Brian Clark (MSU)\nThe IceCube Neutrino Observatory opened the window on neutrino astronomy by discovering high-energy astroph ysical neutrinos in 2013 and identifying the first compelling astrophysica l neutrino source\, the blazar TXS0506+056\, in 2018. In this talk\, I wil l discuss the science reach and ongoing development of the IceCube-Gen2 fa cility--a planned extension to IceCube. IceCube-Gen2 will increase the rat e of observed cosmic neutrinos\, be able to detect fainter neutrino source s\, and extend the measurement of astrophysical neutrinos to higher energi es. I will discuss the envisioned design of the instrument\, which will in clude an enlarged in-ice optical array\, a surface array for the study of cosmic-rays\, and a shallow radio array to detect ultra-high energy (>100 PeV) neutrinos. I will also highlight ongoing efforts to develop and test new instrumentation for IceCube-Gen2.\n\nhttps://indico.ific.uv.es/event/3 965/contributions/14963/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14963/ END:VEVENT BEGIN:VEVENT SUMMARY:Present status of the Baikal-GVD neutrino telescope DTSTART;VALUE=DATE-TIME:20210518T133000Z DTEND;VALUE=DATE-TIME:20210518T140000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14895@indico.ific.uv.es DESCRIPTION:Speakers: Vladimir Aynutdinov (INR RAS)\nBaikal-GVD is a cubic -kilometer scale deep-underwater neutrino detector being constructed in La ke Baikal. Since April 2020 the detector includes seven 8-string clusters carrying in total 2016 optical modules located at depths from 750 m to 127 5 m. The progress in the construction and operation of the Baikal-GVD is r eported. We review the scientific case for Baikal-GVD\, the construction p lan\, and selected results from the partially built array which provides a n effective volume of 0.35 km3 for cascades with energy above 100 TeV.\n\n https://indico.ific.uv.es/event/3965/contributions/14895/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14895/ END:VEVENT BEGIN:VEVENT SUMMARY:Welcome DTSTART;VALUE=DATE-TIME:20210518T125000Z DTEND;VALUE=DATE-TIME:20210518T130000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14994@indico.ific.uv.es DESCRIPTION:Speakers: Juande Zornoza (IFIC)\nhttps://indico.ific.uv.es/eve nt/3965/contributions/14994/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14994/ END:VEVENT BEGIN:VEVENT SUMMARY:Analysis of the first KM3NeT-ORCA data DTSTART;VALUE=DATE-TIME:20210521T141000Z DTEND;VALUE=DATE-TIME:20210521T143000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14801@indico.ific.uv.es DESCRIPTION:Speakers: Valentin Pestel (Nikhef\, NWO)\, zineb aly (Aix Mars eille Univ\, CNRS/IN2P3\, CPPM\, Marseille\, France)\nORCA\, Oscillation R esearch with Cosmics in the Abyss\, is the low energy KM3NeT neutrino unde rwater detector\, located in the French Mediterranean sea. It comprises a dense array of optical modules designed to detect the emitted Cherenkov li ght emitted from charged particles resulting from neutrino interactions in the vicinity of the detector. Its main physics goal is the determination of the neutrino mass hierarchy by quantifying the matter-induced effect on the oscillation probabilities of atmospheric neutrinos in the energy rang e\, 3-50 GeV\, where the effects of neutrino oscillation phenomena are dom inant.\n\n\nIn 2019\, four detection units were operational. Two more had been added in early 2020. This work presents an overview of the detector p erformance in 2019 and 2020 as well as its sensitivity to neutrino oscilla tions.\n\nhttps://indico.ific.uv.es/event/3965/contributions/14801/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14801/ END:VEVENT BEGIN:VEVENT SUMMARY:Comparison of the measured atmospheric muon rate with Monte Carlo simulations and sensitivity study for detection of prompt atmospheric muon s with KM3NeT DTSTART;VALUE=DATE-TIME:20210521T135000Z DTEND;VALUE=DATE-TIME:20210521T141000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14741@indico.ific.uv.es DESCRIPTION:Speakers: Piotr Kalaczyński (NCBJ Warsaw)\nThe KM3NeT Collabo ration has successfully deployed the first detection units of the next gen eration undersea neutrino telescopes in the Mediterranean Sea at the two s ites in Italy and in France. The data sample collected between December 20 16 and January 2020 has been used to measure the atmospheric muon rate at two different depths under the sea level: 3.5 km with KM3NeT/ARCA and 2.5 km with KM3NeT/ORCA . Atmospheric muons represent an abundant signal in a neutrino telescope and can be used to test the reliability of the Monte Ca rlo simulation chain and to study the physics of extensive air showers cau sed by highly-energetic primary nuclei impinging the Earth’s atmosphere. At energies above PeV the contribution from prompt muons\, created right after the first interaction in the shower\, is expected to become dominant \, however its existence was not yet experimentally confirmed. In this con tribution data collected with the first detection units of KM3NeT are comp ared to Monte Carlo simulations based on MUPAGE and CORSIKA codes. The mai n features of the simulation and reconstruction chains are discussed and p resented. Additionally\, sensitivities of both KM3NeT/ARCA and KM3NeT/ORCA to the prompt muon component are derived using CORSIKA code.\n\nhttps://i ndico.ific.uv.es/event/3965/contributions/14741/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14741/ END:VEVENT BEGIN:VEVENT SUMMARY:Atmospheric neutrinos with the first detection units of KM3NeT-ARC A DTSTART;VALUE=DATE-TIME:20210521T133000Z DTEND;VALUE=DATE-TIME:20210521T135000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14740@indico.ific.uv.es DESCRIPTION:Speakers: Anna Sinopoulou ()\nThe KM3NeT Collaboration is cons tructing two deep-sea Cherenkov detectors in the Mediterranean Sea. The AR CA detector aims at TeV-PeV neutrino astronomy\, while the ORCA detector i s optimized for atmospheric neutrino oscillation studies at energies of a few GeV. In this contribution\, an analysis of the data collected with the first deployed detection units of the ARCA detector is presented. A high- purity sample of atmospheric neutrinos is selected demonstrating the capab ility of the ARCA detector.\n\nhttps://indico.ific.uv.es/event/3965/contri butions/14740/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14740/ END:VEVENT BEGIN:VEVENT SUMMARY:Status and plans for the KM3NeT detector DTSTART;VALUE=DATE-TIME:20210518T130000Z DTEND;VALUE=DATE-TIME:20210518T133000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14981@indico.ific.uv.es DESCRIPTION:Speakers: Rosa Coniglione (INFN - LNS)\nhttps://indico.ific.uv .es/event/3965/contributions/14981/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14981/ END:VEVENT BEGIN:VEVENT SUMMARY:Method and portable bench for tests of the laser optical calibrati on system components for the Baikal-GVD underwater neutrino Cherenkov tele scope DTSTART;VALUE=DATE-TIME:20210520T170000Z DTEND;VALUE=DATE-TIME:20210520T172000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14934@indico.ific.uv.es DESCRIPTION:Speakers: Konrad Kopański (H. Niewodniczański Institute of N uclear Physics Polish Academy of Sciences)\nThe large-scale deep underwate r Cherenkov neutrino telescopes like Baikal-GVD\, ANTARES or KM3NeT\, requ ire calibration and testing methods of their optical modules. These method s usually include laser-based systems which allow to check the telescope r esponses to the light and for real-time monitoring of the optical paramete rs of water such as absorption and scattering lengths\, which show seasona l changes in natural reservoirs of water. We will present a testing method of a laser calibration system and a set of dedicated tools developed for Baikal- GVD\, which includes a specially designed and built\, compact\, po rtable\, and reconfigurable scanning station. This station is adapted to p erform fast quality tests of the underwater laser sets just before their d eployment in the telescope structure\, even on ice\, without darkroom. The testing procedure includes the energy stability test of the laser device\ , 3D scan of the light\nemission from the diffuser and attenuation test of the optical elements of the laser calibration system. The test bench cons ists primarily of an automatic mechanical scanner with a movable Si detect or\, beam splitter with a reference Si detector and\, optionally\, Q-switc hed diode-pumped solid-state laser used for laboratory scans of the diffus ers. The presented test bench enables a three-dimensional scan of the ligh t emission from diffusers\, which are designed to obtain the isotropic dis tribution of photons around the point of emission. The results of the meas urement can be easily shown on a 3D plot immediately after the test and ma y be also implemented to a dedicated program simulating photons propagatio n in water\, which allows to check the quality of the diffuser in the scal e of the Baikal-GVD telescope geometry.\n\nhttps://indico.ific.uv.es/event /3965/contributions/14934/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14934/ END:VEVENT BEGIN:VEVENT SUMMARY:Advances in IceCube ice modelling and what to expect from the Upgr ade DTSTART;VALUE=DATE-TIME:20210520T164000Z DTEND;VALUE=DATE-TIME:20210520T170000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14936@indico.ific.uv.es DESCRIPTION:Speakers: Martin Rongen (JGU Mainz)\nThe IceCube Neutrino Obse rvatory instruments about 1 km^3 of deep\, glacial ice at the geographic S outh Pole using 5160 photomultipliers to detect Cherenkov light from relat ivistic\, charged particles. Most IceCube science goals rely on precise un derstanding and modelling of the optical properties of the instrumented ic e. A peculiar light propagation effect observed by IceCube is an anisotrop ic attenuation\, which is aligned with the local flow of the ice. Recent e fforts have shown this effect is most likely due to curved photon trajecto ries resulting from the asymmetric light diffusion in the birefringent pol ycrystalline microstructure of the ice. This new model can be optimized by adjusting the average orientation\, size and shape of the ice crystals. W e present the parametrization of the birefringence effect in our photon pr opagation simulation\, the fitting procedures and results. The anticipated potential of calibration instrumentation the upcoming IceCube Upgrade to improve on known shortcoming of the current ice modelling are also discuss ed.\n\nhttps://indico.ific.uv.es/event/3965/contributions/14936/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14936/ END:VEVENT BEGIN:VEVENT SUMMARY:Laser events analysis in Baikal-GVD DTSTART;VALUE=DATE-TIME:20210520T162000Z DTEND;VALUE=DATE-TIME:20210520T164000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14927@indico.ific.uv.es DESCRIPTION:Speakers: Yuliya Yablokova (JINR)\nIn order to accurately reco nstruct track and cascade events in a neutrino telescope\, it is necessary to have information about the optical properties of the medium. The main purpose of the laser event analysis is to evaluate the light absorption le ngth and the light scattering length in the deep Baikal water. Currently\, the Baikal-GVD detector is equipped with 5 lasers with a wavelength of 53 2 nm\, located on vertical strings at various depths. The lasers emit powe rful flashes of light which are recorded by the Baikal-GVD optical modules . The positions of the lasers are reconstructed from the optical module da ta using a chi^2 fit\, taking into account the anisotropic light emission pattern of the lasers. The optical parameters of the medium are estimated using the likelihood minimization method assisted with Monte-Carlo simulat ions.\n\nhttps://indico.ific.uv.es/event/3965/contributions/14927/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14927/ END:VEVENT BEGIN:VEVENT SUMMARY:The Pacific Ocean Neutrino Explorer (P-ONE) and its pathfinder mis sions DTSTART;VALUE=DATE-TIME:20210520T160000Z DTEND;VALUE=DATE-TIME:20210520T162000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14738@indico.ific.uv.es DESCRIPTION:Speakers: Andreas Gaertner (University of Alberta)\nIn the sea rch for astrophysical neutrinos\, neutrino telescopes instrument large vol umes of clear natural water. Photomultiplier tubes placed along mooring li nes detect the Cherenkov light of secondary particles produced in neutrino interactions\, and allow us to search for possible neutrino sources in th e sky. The P-ONE experiment proposes a new neutrino telescope off the shor e of British Columbia\, where it will complement the sky coverage of other neutrino telescopes.\nTo overcome the challenges of a deep-sea installati on\, we have developed prototype mooring lines in collaboration with Ocean Networks Canada\, an initiative of the University of Victoria\, which pro vides the infrastructure for many Oceanographic instruments. The STRAW and STRAW-b mooring lines\, deployed in 2018 and 2020\, provide continuous mo nitoring of optical water properties at a new possible detector site in th e Pacific.\nWe present the measurements of the pathfinder missions\, and t he plans for the future deployment of P-ONE.\n\nhttps://indico.ific.uv.es/ event/3965/contributions/14738/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14738/ END:VEVENT BEGIN:VEVENT SUMMARY:The study of the 20 inch Large Area MCP-PMTs DTSTART;VALUE=DATE-TIME:20210519T154000Z DTEND;VALUE=DATE-TIME:20210519T160000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14726@indico.ific.uv.es DESCRIPTION:Speakers: Sen QIAN (IHEP\,CAS)\nThe large scalar neutrino dete ctors (JUNO\, HyperK)\, need the 20 inch area PMTs as the photo-detection device for their large photocathode coverage and less electronic channels. In 2009\, the researchers at IHEP have conceived a new concept of large a rea PMTs\, of which the small MCP units replace the bulky Dynode chain. Af ter several years R&D\, the 20 inch MCP-PMT was successfully produced. Thi s type of PMT has large sensitive area\, high QE\, and large P/V for good single photon detection. The JUNO ordered 15000 pic 20 inch MCP-PMTs in De c.2015. Then\, from 2017 to 2020\, all the 20-inch PMTs will be produced a nd tested one by one in the company for JUNO. This presentation will talk about the R&D\, the mass production and batch test result of the 15K piece s of MCP-PMT prototypes for JUNO. Further more\, another Flower-liked MCP- PMT will also be introduced. This new type of 20 inch MCP-PMT designed wi th the TTS less than 5ns\, has already evaluated by the PMT group in Hype rK\, and also be used in the LHAASO project in China.\n\nhttps://indico.if ic.uv.es/event/3965/contributions/14726/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14726/ END:VEVENT BEGIN:VEVENT SUMMARY:Testing of the optical module inside the volume of Cherenkov water detector NEVOD DTSTART;VALUE=DATE-TIME:20210519T164000Z DTEND;VALUE=DATE-TIME:20210519T170000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14737@indico.ific.uv.es DESCRIPTION:Speakers: Semyon Khokhlov (National Research Nuclear Universit y MEPhI)\, Victor Kindin (MEPhI)\nAt the last VLVnT-conference in the talk “NEVOD as a test facility for future neutrino telescopes” presented b y A.A. Petrukhin the methods for testing of optical modules inside the vol ume of the Cherenkov water detector NEVOD have been discussed. It was assu med that in 2020 the new optical module mDOM of the IceCube-Upgrade will b e calibrated in this way. However\, the covid-19 pandemic did not allow to realize this plan.\n So\, these methods have been tested on quasispher ical optical module QSM-6M\, in which PMTs FEU-200 were replaced by PMTs o f Hamamatsu R877. The spatial lattice of the detector NEVOD and deployed o utside of the water tank calibration telescope system and coordinate-track ing detector DECOR allow calibrating the response of OM with respect to th e Cherenkov light from single muons\, muon bundles and cascades with known trajectories. Technique and results of calibration optical modules QSM-6M are presented at this talk.\n\nhttps://indico.ific.uv.es/event/3965/contr ibutions/14737/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14737/ END:VEVENT BEGIN:VEVENT SUMMARY:The OctoPAES board for the validation of KM3NeT data acquisition s ystem DTSTART;VALUE=DATE-TIME:20210519T150000Z DTEND;VALUE=DATE-TIME:20210519T152000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14928@indico.ific.uv.es DESCRIPTION:Speakers: Francesco Filippini (Department of Physics and Astro nomy\, University of Bologna\, INFN-BO)\nFor testing and optimizing key e lements of the KM3NeT data acquisition system\, a test-bench has been set up at the INFN Sezione di Bologna. In this setup\, a full detection unit i s simulated\, to test the optical network\, time synchronisation\, and on- shore computing resources. A fundamental tool in the test-setup is a dedic ated electronic board: “the OctoPAES”. \nBased on an ALTERA Max10 CPLD \, they are designed to deterministically emulate the optical and acoustic signals recorded by the underwater detectors. They allow to stress-test the acquisition system and validate its performance with realistic data. If properly configured\, the optical data provided by the OctoPAES can b e combined to emulate the signals of a through-going muon or other calibr ation events. In this contribution we present the OctoPAES boards and som e of their use cases at the test-bench.\n\nhttps://indico.ific.uv.es/event /3965/contributions/14928/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14928/ END:VEVENT BEGIN:VEVENT SUMMARY:Electronics Reliability methods for Neutrino Telescopes: The KM3Ne T Case DTSTART;VALUE=DATE-TIME:20210519T152000Z DTEND;VALUE=DATE-TIME:20210519T154000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14929@indico.ific.uv.es DESCRIPTION:Speakers: Stephane Colonges (APC)\nThe KM3NeT Collaboration is building a deep-sea neutrino observatory in the Mediterranean Sea equippe d with thousands of glass spheres\, hosting the so-called Digital Optical Modules\, with an instrumented volume of several cubic kilometers. Reliab ility of the components used in the construction of the detectors is of ex treme importance as the deployed Detection Units\, each one composed of 18 Digital Optical Modules\, will not be accessible for any kind of maintena nce and the detector should be functional for a period longer than 10 year s. This work presents the different reliability methods used in KM3NeT to assess and improve the reliability of the electronics housed in the Digita l Optical Modules of KM3NeT.\n\nhttps://indico.ific.uv.es/event/3965/contr ibutions/14929/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14929/ END:VEVENT BEGIN:VEVENT SUMMARY:A long multi-PMT optical sensor for IceCube-Gen2 DTSTART;VALUE=DATE-TIME:20210519T162000Z DTEND;VALUE=DATE-TIME:20210519T164000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14933@indico.ific.uv.es DESCRIPTION:Speakers: Vedant Basu (Wisconsin IceCube Particle Astrophysics Center)\nA new long optical module (LOM) is under development for IceCube -Gen2\, the proposed expansion to the IceCube neutrino observatory at the South Pole. The module is housed in an elongated borosilicate-glass pressu re vessel\, the size of which is constrained by the borehole diameter\, wh ich impacts drilling economy. The designs under consideration use either 1 6 or 18 4-inch PMTs\, conditional on future performance tests\, mounted so as to guarantee full angular coverage. Modular electronics have been cust om-designed to fit into the available space and to minimize cost and power requirements for the ~10000 modules to be installed. We will provide an overview of our approach to these design considerations and summarize the results of our tests and simulations. Prototype modules will be installed in the upcoming IceCube Upgrade.\n\nhttps://indico.ific.uv.es/event/3965/c ontributions/14933/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14933/ END:VEVENT BEGIN:VEVENT SUMMARY:Hybrid optical modules for IceCube Extensions DTSTART;VALUE=DATE-TIME:20210519T160000Z DTEND;VALUE=DATE-TIME:20210519T162000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14938@indico.ific.uv.es DESCRIPTION:Speakers: Anna Pollmann ()\nNovel optical sensor design decoup les the photo-sensitive area from the PMT cathode area. Light guides can b e shaped in a more favourable geometry for the target detector. \nTwelve w avelength shifting optical modules (WOMs) will be deployed in the IceCube Upgrade. \nThe photo-sensitive area is a long cylinder coated with wavelen gth shifting paint which exploits the UV part of the Cherenkov spectrum th at is read out with two PMTs.\nCompared to classic modules the overall noi se is significantly decreased which provides various applications for this new device. \nThe successor of the WOM is the Advanced Cylindrical Optica l Module (ACOM) for IceCube Gen2 which comprises of additional PMTs for ti ming and directional information. Also dichroidic filters are investigated in order to improve the light collection efficiency.\nThe design and perf ormance of the WOM as well as the concepts for the ACOM will be presented. \n\nhttps://indico.ific.uv.es/event/3965/contributions/14938/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14938/ END:VEVENT BEGIN:VEVENT SUMMARY:Embedded software developments in KM3NeT Phase I DTSTART;VALUE=DATE-TIME:20210518T164000Z DTEND;VALUE=DATE-TIME:20210518T170000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14930@indico.ific.uv.es DESCRIPTION:Speakers: Vincent Van Beveren (Nikhef)\nThe KM3NeT Collaborati on has already produced more than one thousand acquisition boards\, used f or building two deep-sea neutrino detectors at the bottom of the Mediterra nean Sea\, with the intention of instrumenting a volume of several cubic k ilometers. The acquisition modules\, the so-called Digital Optical Modules \, house the PMTs and the acquisition and control electronics of the modul e\, the Central Logic Board\, which includes a Xilinx FPGA and embedded s oft processor. The present work presents the architecture and functionalit ies of the software embedded in the soft processor of the Central Logic Bo ard.\n\nhttps://indico.ific.uv.es/event/3965/contributions/14930/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14930/ END:VEVENT BEGIN:VEVENT SUMMARY:Gateware Calibration Unit architecture DTSTART;VALUE=DATE-TIME:20210518T162000Z DTEND;VALUE=DATE-TIME:20210518T164000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14931@indico.ific.uv.es DESCRIPTION:Speakers: David Calvo (IFIC)\, Diego Real Mañez (IFIC)\nThe K M3NeT Collaboration is currently deploying the first Detection Units of a neutrino observatory in the Mediterranean Sea\, which\, once completed\, w ill be equipped with tens of thousand of so-called Digital Optical Modules . In addition to the Detection Units KM3NeT has designed an independent Ca libration Unit\, housing a set of calibration instruments\, including e.g . an acoustic beacon and a laser beacon. The firmware and the embedded sof tware developed to operate the Calibration Unit are presented here.\n\nhtt ps://indico.ific.uv.es/event/3965/contributions/14931/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14931/ END:VEVENT BEGIN:VEVENT SUMMARY:Proposal for fiber optic data acquisition system for Baikal-GVD DTSTART;VALUE=DATE-TIME:20210518T160000Z DTEND;VALUE=DATE-TIME:20210518T162000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14932@indico.ific.uv.es DESCRIPTION:Speakers: Aleksandr Doroshenko (INR RAS)\nThe first stage of t he construction of the deep underwater neutrino telescope Baikal-GVD is pl anned to be completed in 2024. The second stage of the detector deployment is planned to be carried out using a data acquisition system based on fib er optic technologies\, which will allow for increased data throughput and more flexible trigger conditions. A dedicated test facility has been buil t and deployed at the Baikal-GVD site to test the new technological soluti ons. We present the principles of operation and the results of tests of th e new data acquisition system.\n\nhttps://indico.ific.uv.es/event/3965/con tributions/14932/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14932/ END:VEVENT BEGIN:VEVENT SUMMARY:Underwater autonomous voltage supply systems DTSTART;VALUE=DATE-TIME:20210518T154000Z DTEND;VALUE=DATE-TIME:20210518T160000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14815@indico.ific.uv.es DESCRIPTION:Speakers: Emanuele Leonora (INFN\, sezione di Catania)\nThe KM 3NeT project aims to build a neutrino telescope in the depth of the Medite rranean Sea. The detector consists of a Kilometer-cube grid of Optical Mod ules\, photosensors encapsulated into transparent pressure resistant glass spheres. A crucial component is the acoustic positioning system\, which p rovides the position of photodetectors and structures in the deep sea with an accuracy of about 10 cm. The system is based on measurements of acoust ic signals between fixed seabed emitters and receiving hydrophones. A subs et of the required acoustic beacons is powered by an autonomous voltage su pply system\, based on a battery pack. \nThe talk will describe the innova tive design used to build the battery packs\, deriving from the expertise of the Catania KM3NeT group in the construction of underwater detectors en capsulated in glass vessels. The battery pack uses a pressure resistant 17 -inch glass sphere as housing\, identical to those used for optical module s. It contains a cluster of 96 batteries connected to supply an output vol tage of 12 Volt with a total capacity of 410 Ah. With a dimension of 44 c m and a weight of 42 kg\, the final result has then a very high energy den sity\, especially for deep underwater application. The cluster of batterie s is surrounded by silicone glue\, the same technology used in the optical modules\, that stacks all the part together and ensures mechanical streng th and a stable link with the vessel. In order to increase the operating t ime of the beacon\, a custom designed wake-up board implements a duty cycl e operating mode\, where an electronic switch controlled by an ARDUINO mic roprocessor connects the battery pack to the beacon only for a defined tim e. So far\, 6 supply systems have worked among the Italian and the France sea site of the KM3NeT project. The system\, designed for beacons\, could be easily used to supply voltage for also other kinds of detectors in unde rwater high-pressure environments.\n\nhttps://indico.ific.uv.es/event/3965 /contributions/14815/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14815/ END:VEVENT BEGIN:VEVENT SUMMARY:Status of the DOM electronics DTSTART;VALUE=DATE-TIME:20210518T152000Z DTEND;VALUE=DATE-TIME:20210518T154000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14739@indico.ific.uv.es DESCRIPTION:Speakers: Diego Real Mañez (IFIC)\nThe KM3NeT Collaboration h as already produced electronics to produce more than one thousand Digital Optical Modules\, which have started to be deployed at the bottom of the M editerranean Sea. An upgrade of the electronics is currently underway\, ex pecting to have a revision of it by mid-2021 Here we describe the main imp rovements added to the DOM electronics\, including the new high reliabilit y transceiver in the Central Logic Board and the increased efficiency in t he Power board.\n\nhttps://indico.ific.uv.es/event/3965/contributions/1473 9/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14739/ END:VEVENT BEGIN:VEVENT SUMMARY:Evolution of the IceCube Data Acquisition System for IceCube-Gen2 DTSTART;VALUE=DATE-TIME:20210518T150000Z DTEND;VALUE=DATE-TIME:20210518T152000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14935@indico.ific.uv.es DESCRIPTION:Speakers: John Kelley (Univ. of Wisconsin – Madison)\nIceCub e-Gen2 is a future large-scale extension to the IceCube Neutrino Observato ry\, a kilometer-scale neutrino detector at the geographic South Pole. The IceCube data acquisition system (DAQ) architecture\, while running stably with over 99% uptime\, will be re-optimized for IceCube-Gen2 to solve des ign challenges with power consumption\, communications bandwidth\, and cab le specifications\, while also integrating new types of instrumentation su ch as the cosmic ray and radio neutrino detection components. In particula r\, we describe how distribution of the photomultiplier tube signal digiti zation and pre-trigger storage can reduce power and bandwidth requirements . Changes to IceCube's custom communications protocol can also relax cross talk requirements on the copper cabling. We report on the status of these optimizations in the prototype Gen2 digital optical module design for the upcoming IceCube Upgrade.\n\nhttps://indico.ific.uv.es/event/3965/contribu tions/14935/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14935/ END:VEVENT BEGIN:VEVENT SUMMARY:In-situ gain calibration based on single byte PMT signals DTSTART;VALUE=DATE-TIME:20210518T154000Z DTEND;VALUE=DATE-TIME:20210518T160000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14876@indico.ific.uv.es DESCRIPTION:Speakers: Bouke Jung (Nikhef and University of Amsterdam)\nBou ke Jung$^1$\, Maarten de Jong$^2$\, Paolo Fermani$^3$ \non behalf of the K M3NeT collaboration\n\n$^1$) University of Amsterdam\, Nikhef\nbjung@nikhe f.nl\n$^2$) Leiden University\, Nikhef\nmjg@nikhef.nl\n$^3$) Sapienza Uni versità di Roma\npaolo.fermani@roma1.infn.it\n\nPresent and foreseen neut rino observatories\, such as IceCube\, P-ONE\, GVD\, Antares and KM3NeT ha ve to operate in challenging environments\, where high count rates go hand in hand with limited bandwidths.\nTo keep the data rates in these experim ents within the allowed range\, rigorous data reduction is essential. \nAt the same time\, sufficient information needs to be recorded to accurately measure the neutrino properties. \nThe KM3NeT collaboration has developed a novel data acquisition procedure\, in which each PMT signal is reduced to a datapacket of 6 Bytes\, containing the PMT identifier (1 B)\, the hit time (4 B) and the duration over which the associated PMT pulse exceeded the threshold (1B). \nThis talk highlights an analytical pulse-shape model which is used to perform in-situ calibrations of the gain and its spread\ , using only the time-over-threshold statistics associated with single pho ton hits.\nIn addition\, a set of tools is presented which allows in-situ monitoring of the PMT gains over time.\nData from the first 6 detector str ings deployed at the French KM3NeT site (ORCA)\, \nindicate that PMT high- voltages can be successfully tuned to obtain nominal gain-values\, \nallow ing detector operation with stable PMT gains over the lifetime of the expe riment.\n\nhttps://indico.ific.uv.es/event/3965/contributions/14876/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14876/ END:VEVENT BEGIN:VEVENT SUMMARY:The Calibration Units of KM3NeT DTSTART;VALUE=DATE-TIME:20210518T152000Z DTEND;VALUE=DATE-TIME:20210518T154000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14816@indico.ific.uv.es DESCRIPTION:Speakers: Rémy Le Breton (APC)\nKM3NeT is a deep-sea infrastr ucture composed of two neutrino telescopes being deployed in the Mediterra nean Sea : ARCA\, near Sicily in Italy\, designed for neutrino astronomy a nd ORCA\, near Toulon in France\, designed for the study of atmospheric ne utrino oscillations. These two telescopes are 3D arrays of optical modules used to detect the Cherenkov radiation\, which is a signature of charged particles created in the neutrino interaction and propagating faster than light in the sea water.\n\nTo achieve the best performance for the event r econstruction in the telescopes\, the exact location of the optical module s\, affected by the sea current\, must be known at any time and the timing resolution between optical modules must reach the sub-nanosecond level. M oreover\, the properties of the sea environment\, such as temperature and salinity\, are continuously monitored to allow best modelling of the acous tic signal propagation in the water.\n\nKM3NeT will deploy Calibration Uni ts hosting instruments dedicated to meet these calibration goals. The Cali bration Base will host a Laser Beacon for time calibration and a long-base line acoustic emitter and a hydrophone\, which are part of the positioning system for the optical modules. Some of these Calibration Units will also be equipped with an Instrumentation Unit hosting environmental monitoring instruments. \n\nThis talk describes all the devices\, features and purpo ses of the Calibration Units\, with a special emphasis on the first such u nit that will be deployed on the ORCA site in 2021.\n\nhttps://indico.ific .uv.es/event/3965/contributions/14816/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14816/ END:VEVENT BEGIN:VEVENT SUMMARY:Observation of the cosmic ray shadow of the Sun with the ANTARES n eutrino telescope DTSTART;VALUE=DATE-TIME:20210518T162000Z DTEND;VALUE=DATE-TIME:20210518T164000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14781@indico.ific.uv.es DESCRIPTION:Speakers: Andrey Romanov (Dipartimento di Fisica dell’Univer sit`a\, Via Dodecaneso 33\, Genova 16146\, Italy\; NFN\, Sezione di Genova )\nThe ANTARES neutrino telescope is operating in the Mediterranean Sea in its full configuration since 2008. On their journey to the Earth\, cosmic rays (CRs) can be absorbed by celestial objects\, like the Sun\, leading to a deficit in secondary muons produced by CR interactions from the solid angle region covered by the Sun\, the so-called Sun "shadow" effect. This phenomenon can be used to evaluate fundamental telescope characteristics: the detector angular resolution and pointing accuracy. This work describe s the study of the Sun "shadow" effect using the ANTARES data collected be tween 2008 and 2017. The statistical significance of the Sun shadow observ ation is $3.7\\sigma$ and the estimated angular resolution value of the AN TARES telescope for downward-going muons is $0.59^{\\circ} \\pm 0.10^{\\c irc}$. This result is consistent with the expectations obtained from the M onte Carlo simulations and also with the estimation from the Moon "shadow" analysis of 2007-2016 years. No evidence of systematic pointing shift is found and the resulting pointing accuracy is in agreement with the expecta tions.\n\nhttps://indico.ific.uv.es/event/3965/contributions/14781/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14781/ END:VEVENT BEGIN:VEVENT SUMMARY:Monitoring of optical properties of the deep water of Lake Baikal DTSTART;VALUE=DATE-TIME:20210518T164000Z DTEND;VALUE=DATE-TIME:20210518T170000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14786@indico.ific.uv.es DESCRIPTION:Speakers: Evgenii Ryabov (Baikal-collaboration)\, Boris Tarash chansky (Baikal-collaboration)\nWe present the results of a one year monit oring of absorption and scattering lengths of light with wave length 375÷ 532nm within the effective volume of the \nBaikal-GVD deep underwater neut rino telescope. The measurements were \nperformed using a dedicated device \, BAIKAL-5D\, which was installed \nduring the 2020 winter expedition at a depth 1250 m. The device has a shaded point-like isotropic light source with spectral resolution about 3nm. A wide angle light receiver is moved b y a stepper motor so that the distance between the receiver and the light source changed between 0.9 and 7\,4 m. Absorption and scattering lengths w ere measured every week in 6 spectral points. Shot-time variation of absor ption and scattering length was estimated.\n\nhttps://indico.ific.uv.es/e vent/3965/contributions/14786/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14786/ END:VEVENT BEGIN:VEVENT SUMMARY:A self-monitoring precision calibration light source for large-vol ume neutrino telescopes DTSTART;VALUE=DATE-TIME:20210518T160000Z DTEND;VALUE=DATE-TIME:20210518T162000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14784@indico.ific.uv.es DESCRIPTION:Speakers: Felix Henningsen (Max Planck Institute for Physics / Technical University Munich)\nWith neutrino astronomy on the rise\, calib ration aspects of large-volume detectors are becoming one of the key targe ts to boost detector performance. In the scope of the IceCube Upgrade plan ned for the South Pole season of 2022/23\, we developed a novel isotropic\ , self-monitoring\, precision calibration light source aimed for use in la rge-volume detectors in order to boost understanding of the detector. We p resent the device characteristics as well as first studies of calibration impacts for different detection environments.\n\nhttps://indico.ific.uv.es /event/3965/contributions/14784/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14784/ END:VEVENT BEGIN:VEVENT SUMMARY:Time synchronization system of the Baikal-GVD DTSTART;VALUE=DATE-TIME:20210518T150000Z DTEND;VALUE=DATE-TIME:20210518T152000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14767@indico.ific.uv.es DESCRIPTION:Speakers: Dmitrii Petukhov (INR RAS)\nThe Baikal-GVD neutrino telescope is currently a multi-cluster infrastructure composed by 7 separa tely operating clusters of more than 2000 photosensitive modules in lake B aikal. Single cluster comprises 8 strings of 288 optical modules by means of 36 OM on each string divided into three groups (sections) of 12-channel control modules with ADCs. Two independent systems of time synchronizatio n are integrated in the GVD. This paper presents the methods of time synch ronization between the different GVD components (optical modules\, section s\, clusters) and estimations of time synchronization accuracy.\n\nhttps:/ /indico.ific.uv.es/event/3965/contributions/14767/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14767/ END:VEVENT BEGIN:VEVENT SUMMARY:The KM3NeT Control Unit: advanced techniques and best practices in data acquisition software development DTSTART;VALUE=DATE-TIME:20210520T154000Z DTEND;VALUE=DATE-TIME:20210520T160000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14783@indico.ific.uv.es DESCRIPTION:Speakers: Cristiano Bozza (University of Salerno and INFN Grup po Collegato di Salerno)\nThe Control Unit of the KM3NeT Data Acquisition is the software suite that is responsible for operating all the component s of the KM3NeT telescopes in a coordinated and scientifically proficient way. It controls a wide span of parameters and procedures\, from the power supplies\, to the operating voltages of more than 64000 photomultipliers in each detector block\, to the setup of the various trigger algorithms th at are applied online. The same software suite is also used in all test an d qualification benches\, from single Digital Optical Modules to full Det ection Units. As the KM3NeT detectors are being incrementally built\, the Control Unit is employed in a variety of setups and configurations\, and i s a dynamic software project\, still adapting to shifting needs. \n\nThe c onflicting requirements of flexibility and stability are reconciled by pro per code development policies. The Control Unit is able to cope with dyna mically changing scenarios of multiple firmware generations coexisting in the same detector\, for various reasons including hardware compatibility a s well as testing purposes. The code also allows for static verification a nd extensive unit tests. \n\nA Central Logic Board Simulator software was also developed to help test the whole architecture. Such a simulator provi des properly faked slow control parameters\, features a fully specificatio n-compliant state machine and can generate fake data with specific profile s to feed the Trigger and Data Acquisition System. In this way\, offline i ntegration tests can be executed at each new software release\, ensuring t heir smooth deployment to production sites and minimising operator chances of mistakes.\n\nhttps://indico.ific.uv.es/event/3965/contributions/14783/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14783/ END:VEVENT BEGIN:VEVENT SUMMARY:Meeting the challenge of Open Science in KM3NeT DTSTART;VALUE=DATE-TIME:20210520T152000Z DTEND;VALUE=DATE-TIME:20210520T154000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14764@indico.ific.uv.es DESCRIPTION:Speakers: Jutta Schnabel (ECAP - FAU Erlangen-Nürnberg)\nIn t he upcoming decades\, the KM3NeT detectors will produce valuable data that can be used in various scientific contexts from astro- and particle physi cs to environmental and Earth and Sea science. Based on the Open Science p olicy established by the KM3NeT Collaboration\, several efforts to offer s cience-ready data\, foster common analysis approaches and publish open sou rce software are currently pursued. In this contribution\, ongoing project s focusing on the exchange of high-level data and simulation derivatives\, production of particle event simulations and establishment of an integrat ed computing environment supporting an open-science focused workflow will be discussed.\n\nhttps://indico.ific.uv.es/event/3965/contributions/14764/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14764/ END:VEVENT BEGIN:VEVENT SUMMARY:Baikal GVD data's transfer and organization DTSTART;VALUE=DATE-TIME:20210520T150000Z DTEND;VALUE=DATE-TIME:20210520T152000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14763@indico.ific.uv.es DESCRIPTION:Speakers: Timur Elzhov (Joint Institute for Nuclear Research ( JINR))\nData collected by the Baikal Gigaton Volume Detector (Baikal GVD) needs to be processed in real time at a data centre located in Dubna\, Mos cow Oblast\, approx. 4\,300 km away. An infrastructure facilitating data t ransfer and storage was designed and implemented. In this paper\, we discu ss the details of the implementation and our approach to ensuring fault to lerance and 24/7 access to the data.\n\nhttps://indico.ific.uv.es/event/39 65/contributions/14763/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14763/ END:VEVENT BEGIN:VEVENT SUMMARY:Graph Neural Networks for reconstruction and classification in KM3 NeT DTSTART;VALUE=DATE-TIME:20210520T162000Z DTEND;VALUE=DATE-TIME:20210520T164000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14775@indico.ific.uv.es DESCRIPTION:Speakers: Stefan Reck (ECAP - University of Erlangen)\nKM3NeT\ , a neutrino telescope currently under construction in the Mediterranean S ea\, consists of a network of large-volume Cherenkov detectors. Its two di fferent sites\, ORCA and ARCA\, are optimised for few GeV and TeV-PeV neut rino energies\, respectively. This allows for studying a wide range of phy sics topics spanning from the determination of the neutrino mass hierarchy to the detection of neutrinos from astrophysical sources. \n\nDeep Learni ng techniques provide promising methods to analyse the signatures induced by charged particles traversing the detector. This talk will cover a Deep Learning based approach using Graph Convolutional Networks to classify and reconstruct events in both the ORCA and ARCA detector. Performance studie s on simulations as well as applications to real data will be presented\, together with comparisons to classical approaches.\n\nhttps://indico.ific. uv.es/event/3965/contributions/14775/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14775/ END:VEVENT BEGIN:VEVENT SUMMARY:Detecting double shower $\\nu_{\\tau}$ signatures with the KM3NeT detector DTSTART;VALUE=DATE-TIME:20210520T160000Z DTEND;VALUE=DATE-TIME:20210520T162000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14762@indico.ific.uv.es DESCRIPTION:Speakers: Thijs van Eeden (Nikhef)\nThe detection of astrophys ical $\\nu_\\tau$ is an important verification of the observed flux of hig h-energy neutrinos. A flavour ratio of $\\nu_{e} : \\nu_\\mu : \\nu_\\tau \\approx 1 : 1 : 1$ is predicted for astrophysical neutrinos measured at E arth due to neutrino oscillations. On top of this\, the $\\nu_\\tau$ offer s a unique channel for neutrino astronomy due to absence of an atmospheric $\\nu_\\tau$ background contribution. When a $\\nu_\\tau$ interacts it pr oduces a particle shower and often a $\\tau$ lepton which in turn decays m ainly into another shower. This results in a double shower signature. An e xcellent angular resolution can be achieved when both shower vertices are reconstructed. The main challenge lies in identifying two showers when the $\\tau$ energy and travelling length are small. The KM3NeT/ARCA detector\ , which is under construction in the Mediterranean sea\, will be able to d etect this signature due to its timing and spatial resolution for showers. We will discuss the reconstruction algorithms under development and the f irst performance estimates for detecting double showers using KM3NeT.\n\nh ttps://indico.ific.uv.es/event/3965/contributions/14762/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14762/ END:VEVENT BEGIN:VEVENT SUMMARY:Low Energy Event Classification in IceCube using Boosted Decision Trees DTSTART;VALUE=DATE-TIME:20210520T154000Z DTEND;VALUE=DATE-TIME:20210520T160000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14760@indico.ific.uv.es DESCRIPTION:Speakers: Kayla Leonard DeHolton (University of Wisconsin-Madi son)\nThe DeepCore sub-array within the IceCube Neutrino Observatory is a densely instrumented region of Antarctic ice designed to observe atmospher ic neutrino interactions above 5 GeV via Cherenkov radiation. An essential aspect of any neutrino oscillation analysis is the ability to accurately identify the flavor of neutrino events in the detector. This task is parti cularly difficult at low energies when very little light is deposited in t he detector. This talk will discuss the use of machine learning to perform event classification at low energies in IceCube using a boosted decision tree. A BDT is trained using reconstructed quantities to identify track-li ke events\, which result from muon neutrino charged current interactions. This new method improves the accuracy of particle identification compared to traditional classification methods which rely on univariate straight cu ts.\n\nhttps://indico.ific.uv.es/event/3965/contributions/14760/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14760/ END:VEVENT BEGIN:VEVENT SUMMARY:A new and improved IceCube point-source analysis DTSTART;VALUE=DATE-TIME:20210520T164000Z DTEND;VALUE=DATE-TIME:20210520T170000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14814@indico.ific.uv.es DESCRIPTION:Speakers: Chiara Bellenghi (Physics Department - Technical U niversity Munich)\nThe IceCube Neutrino Observatory investigates high-ener gy astrophysical phenomena by studying the corresponding high-energy neutr ino signal. Its successful discovery of a diffuse flux of astrophysical ne utrinos with energies up to the PeV scale in 2013 has triggered a vast eff ort to identify this signal's sources\, which recently resulted in an impr oved analysis method. Here\, we present a new IceCube point-source search that improves the accuracy of the statistical analysis\, especially at ene rgies of a few TeV and below. The new approach includes multidimensional k ernel density estimation based probability density functions\, angular err or estimates using a boosted decision tree\, and a new deep neural network energy estimator.\n\nhttps://indico.ific.uv.es/event/3965/contributions/1 4814/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14814/ END:VEVENT BEGIN:VEVENT SUMMARY:Characterization of Starting Track Events above 1 TeV in IceCube DTSTART;VALUE=DATE-TIME:20210520T152000Z DTEND;VALUE=DATE-TIME:20210520T154000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14812@indico.ific.uv.es DESCRIPTION:Speakers: Manuel Silva ()\nThe IceCube Neutrino Observatory is a cubic kilometer-sized detector designed to detect neutrinos of astrophy sical origin. We discuss a new method using a boosted decision tree to cla ssify and reduce the cosmic ray muon rates from ~billion per year to ~1 pe r year\, the same BDT is also used to select for starting track events (~9 00 per year). The classification and removal of incoming muons is also eff icient at removing atmospheric neutrinos with accompanying muons allowing us to characterize the astrophysical neutrino flux at energies between 1- 100 TeV in the southern sky. The high purity starting track dataset has tw o advantages: excellent energy and angular resolution. The presence of the hadron and muon allow us to directly reconstruct the energy of the neutri no due to the vertex being well contained within the detector volume. A Ra ndom Forest is used resulting in a neutrino energy resolution below 30%. T he outgoing muon track is then used to reconstruct the neutrino direction with an estimated median angular resolution of 1.4° at 1 TeV improving to 0.7° at 100 TeV. These advantages are particularly useful in this high-s tatistic starting track dataset where detector and theoretical systematics begin to dominate over statistical uncertainty.\n\nhttps://indico.ific.uv .es/event/3965/contributions/14812/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14812/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutrino direction resolution of the ARIANNA detector\, with Impli cations for future ultra-high energy neutrino astronomy DTSTART;VALUE=DATE-TIME:20210520T170000Z DTEND;VALUE=DATE-TIME:20210520T172000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14785@indico.ific.uv.es DESCRIPTION:Speakers: Christian Glaser (Uppsala University)\nHigh-energy n eutrinos with energies above a few $10^{16}~$eV can be measured efficientl y with in-ice radio detectors which is explored successfully in the ARIANN A test-bed detector\, an array of shallow radio detector stations. Here\, we demonstrate the neutrino pointing capabilities of a shallow radio stati on. Using the residual hole from the South Pole Ice Core Project\, radio p ulses were emitted from a transmitter located up to 1.7 km below the snow surface. By measuring these signals with an ARIANNA surface station\, the angular and polarization reconstruction abilities are quantified\, which are required to measure the direction of the neutrino. The direction to th e transmitted radio pulse was measured with an angular resolution of $0.37 ^\\circ$. For polarization\, the statistical error of the polarization vec tor was measured to $1^\\circ$ with a slow systematic variation as a funct ion of depth of $2.7^\\circ$. We also report on the results of a simulatio n study using NuRadioMC to determine the statistical uncertainty at low si gnal strengths. Using a global fit to the recorded voltage traces of the 5 antennas of a shallow station\, we find a neutrino space angle resolution of below $3^\\circ$ of all triggered events.\n\nhttps://indico.ific.uv.es /event/3965/contributions/14785/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14785/ END:VEVENT BEGIN:VEVENT SUMMARY:Suppression techniques for background cascades produced by atmosph eric muon bundles DTSTART;VALUE=DATE-TIME:20210520T150000Z DTEND;VALUE=DATE-TIME:20210520T152000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14777@indico.ific.uv.es DESCRIPTION:Speakers: Zuzana Bardačová (Comenius University in Bratislav a)\nDetection of high energy astrophysical neutrinos is the main aim of Ba ikal-GVD (Gigaton Volume\nDetector) neutrino experiment located in the sou thern part of Lake Baikal. It is a three dimensional grid of optical modul es (OMs)\, which are attached to the vertical cables\, called strings. The whole detector is sub-arranged into functionally independent units\, refe rred to as clusters.\n\nHighly energetic muons created by muon neutrino ch arged current interactions in the water induce “track-like” events. Ch arged-current interactions of electron neutrino and neutral-current intera ctions of all three neutrino flavours create a unique light signature of a single “cascade” in the detector. Nevertheless\, muons can also produ ce cascade-like signatures via discrete stochastic energy losses. For that reason\, atmospheric muon bundles represent the most abundant background in the search of astrophysical neutrinos via cascades. Therefore\, differe nt kinds of data analysis techniques for the suppression of background eve nts have been developed.\n\nThese methods predominantly rely on the timing and charge information of detected signals at the OMs (called hits). Whil e one method tries to find the maximum number of track hits among cascade hits\, the other uses the distribution of charges and positions of hit OMs associated with cascade events. All suppression tools were developed and tested on the Monte Carlo simulations of neutrino-induced cascades and atm ospheric muon bundles.\n\nhttps://indico.ific.uv.es/event/3965/contributio ns/14777/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14777/ END:VEVENT BEGIN:VEVENT SUMMARY:Direction Reconstruction using a CNN for GeV Scale Neutrinos in Ic eCube DTSTART;VALUE=DATE-TIME:20210519T152000Z DTEND;VALUE=DATE-TIME:20210519T154000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14893@indico.ific.uv.es DESCRIPTION:Speakers: Shiqi Yu (Michigan State University)\nThe\n IceCube Neutrino Observatory is designed to observe neutrinos interacting deep wit hin the South Pole ice. It consists of 5\,160 digital optical modules\, wh ich are arrayed over a cubic kilometer from 1\,450 m to 2\,450 m depth. At the lower center of the array is the DeepCore subdetector. It has a dense r configuration which lowers the observable energy threshold to about 10 G eV and creates the opportunity to study neutrino oscillations with low ene rgy atmospheric neutrinos. A precise reconstruction of neutrino direction is critical in the measurements of oscillation parameters. In this talk\, I will present a method to reconstruct the zenith angle of 10-GeV scale ev ents in IceCube by using a convolutional neural network and compare the re sult to that of the current likelihood-based reconstruction algorithm.\n\n https://indico.ific.uv.es/event/3965/contributions/14893/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14893/ END:VEVENT BEGIN:VEVENT SUMMARY:Deep-learning reconstruction in ANTARES DTSTART;VALUE=DATE-TIME:20210519T162000Z DTEND;VALUE=DATE-TIME:20210519T164000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14774@indico.ific.uv.es DESCRIPTION:Speakers: Salva Ardid (Universitat Politècnica de València)\ nANTARES is currently the largest undersea neutrino telescope\, located in the Mediterranean Sea and taking data in its full configuration since 200 8. It consists of a 3D array of photosensors\, instrumenting about 10Mt of seawater to detect Cherenkov light induced by secondary particles from ne utrino interactions. The event reconstruction and background discriminatio n is challenging and machine-learning techniques are explored to improve t he performance. In this contribution\, two case studies are presented. In the first one\, a deep-learning approach is used to improve the direction reconstruction of low-energy single-line events\, for which the reconstruc tion of the azimuth angle of the incoming neutrino is particularly difficu lt. We observe a promising improvement in resolution over classical recons truction techniques and expect to at least double our sensitivity in the l ow-energy range\, important for dark matter searches. The second study emp loys deep convolutional neural networks for neutrino vs background classif ication and for energy determination. For both studies\, performance resul ts will be presented and compared to other techniques used in ANTARES.\n\n https://indico.ific.uv.es/event/3965/contributions/14774/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14774/ END:VEVENT BEGIN:VEVENT SUMMARY:Muon track reconstruction algorithms for Baikal-GVD DTSTART;VALUE=DATE-TIME:20210519T160000Z DTEND;VALUE=DATE-TIME:20210519T162000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14773@indico.ific.uv.es DESCRIPTION:Speakers: Grigory Safronov (INR RAS & JINR)\nMuon track recons truction methods developed for Baikal-GVD detector\nand their performance are discussed in this talk. This includes\nmethods for the rejection of no ise due to water chemilumenescence and\ntrack parameter reconstruction bas ed on chi^2 minimisation. The\nperformance of the algorithms is assessed u sing realistic Monte Carlo\n(MC) simulations of the detector. Benchmark re sults obtained on real\ndata from Baikal-GVD are compared to MC prediction s.\n\nhttps://indico.ific.uv.es/event/3965/contributions/14773/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14773/ END:VEVENT BEGIN:VEVENT SUMMARY:An efficient hit selection algorithm for muon reconstruction in Ba ikal-GVD DTSTART;VALUE=DATE-TIME:20210519T154000Z DTEND;VALUE=DATE-TIME:20210519T160000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14765@indico.ific.uv.es DESCRIPTION:Speakers: Alexander Avrorin (INR RAS)\nThe Baikal-GVD is a lar ge scale neutrino telescope being constructed in Lake Baikal. The majority of signal detected by the telescope are noise hits\, caused primarily by the luminescence of the Baikal water. Separating noise hits from the hits produced by Cherenkov light emitted from the muon track is a challenging p art of the muon event reconstruction. We present an algorithm that utilize s a known directional hit causality criterion to construct a graph of hits and then use a clique-based technique to select the subset of signal hits . The algorithm was tested on realistic detector Monte-Carlo simulation fo r a wide range of muon energies and has proved to select a pure sample of PMT hits from Cherenkov photons while retaining above 90% of original sign al.\n\nhttps://indico.ific.uv.es/event/3965/contributions/14765/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14765/ END:VEVENT BEGIN:VEVENT SUMMARY:Using Convolutional Neural Networks to Reconstruct Energy of GeV S cale IceCube Neutrinos DTSTART;VALUE=DATE-TIME:20210519T150000Z DTEND;VALUE=DATE-TIME:20210519T152000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14813@indico.ific.uv.es DESCRIPTION:Speakers: Jessie Micallef (MSU)\nThe IceCube Neutrino Observat ory\, located under 1.4 km of Antarctic ice\,\ninstruments a cubic kilomet er of ice with 5\,160 optical modules that detect\nCherenkov radiation ori ginating from neutrino interactions. The more\ndensely instrumented center \, DeepCore\, aims to detect atmospheric neutrinos\nat 10-GeV scales to im prove important measurements of fundamental neutrino\nproperties such as t he oscillation parameters and to search for\nnon-standard interactions. Se nsitivity to oscillation parameters\, dependent\non the distance traveled over the neutrino energy (L/E)\, is limited in\nIceCube by the resolution of the arrival angle (which determines L) and\nenergy (E). Event reconstru ction improvements can therefore directly lead\nto advancements in oscilla tion results. This work uses a Convolutional\nNeural Network (CNN) to reco nstruct the energy of 10-GeV scale neutrino\nevents in IceCube\, providing results with competitive resolutions and\nfaster runtimes than previous l ikelihood-based methods.\n\nhttps://indico.ific.uv.es/event/3965/contribut ions/14813/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14813/ END:VEVENT BEGIN:VEVENT SUMMARY:KM3NeT Detection Unit Line Fit reconstruction using positioning se nsors data DTSTART;VALUE=DATE-TIME:20210519T164000Z DTEND;VALUE=DATE-TIME:20210519T170000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14782@indico.ific.uv.es DESCRIPTION:Speakers: Dídac Diego-Tortosa (Universitat Politècnica de Va lència (UPV) – Institut d'Investigació per a la Gestió Integrada de Z ones Costaneres (IGIC))\nKM3NeT is constructing two large neutrino detecto rs in the Mediterranean Sea: KM3NeT/ARCA\, located near Sicily and aiming at neutrino astronomy\, and KM3NeT/ORCA\, located near Toulon and designed for neutrino oscillation studies. The two detectors\, together\, will hav e hundreds of Detection Units (DUs) with 18 Digital Optical Modules (DOMs) maintained vertical by buoyancy\, forming a large 3D optical array for de tecting the Cherenkov light produced after the neutrino interactions. To p roperly reconstruct the direction of the incoming neutrino\, the position of the DOMs must be known precisely with an accuracy of less than 10 cm\, and since the DUs are affected by sea current the position will be measure d every 10 minutes. For this purpose\, there are acoustic and orientation sensors inside the DOMs. An Attitude Heading Reference System (AHRS) chip provides the components values of the Acceleration and Magnetic field in t he DOM\, from which it is possible to calculate Yaw\, Pitch\, and Roll for each floor of the line. A piezo sensor detects the signals from fixed aco ustic emitters on the sea floor\, so to position it by trilateration. Data from these sensors are used as an input to reconstruct the shape of the e ntire line based on a DU Line Fit mechanical model. This talk presents an overview of the KM3NeT monitoring system\, as well as the line fit model a nd its results.\n\nhttps://indico.ific.uv.es/event/3965/contributions/1478 2/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14782/ END:VEVENT BEGIN:VEVENT SUMMARY:Automatic data processing for Baikal-GVD neutrino observatory DTSTART;VALUE=DATE-TIME:20210518T160000Z DTEND;VALUE=DATE-TIME:20210518T162000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14780@indico.ific.uv.es DESCRIPTION:Speakers: Bair Shaybonov (JINR)\nBaikal-GVD is a gigaton-scale neutrino observatory under construction in Lake Baikal. It currently prod uces about 100GB of data every day. For their automatic processing\, the B aikal Analysis and Reconstruction software (BARS) was developed. At the mo ment\, it includes such stages as a hit extraction from PMT waveforms\, as sembling events from raw data\, assigning timestamps to events\, determini ng the position of the optical modules using an acoustic positioning syste m\, muon track and cascade reconstruction\, as well as the alert signal ge neration. These stages are implemented as C++ programs which are executed sequentially one after another and can be represented as a directed acycli c graph. The most resource-consuming programs run in parallel to speed up processing. A separate Python package based on the luigi package is respon sible for program execution control. Additional information like program e xecution status\, run metadata etc are saved into a central database and t hen displayed on the dashboard. Results can be obtained several hours afte r the run completion.\n\nhttps://indico.ific.uv.es/event/3965/contribution s/14780/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14780/ END:VEVENT BEGIN:VEVENT SUMMARY:Monitoring pipeline for Baikal-GVD DTSTART;VALUE=DATE-TIME:20210518T170000Z DTEND;VALUE=DATE-TIME:20210518T172000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14766@indico.ific.uv.es DESCRIPTION:Speakers: Alexander Avrorin (INR RAS)\nBaikal-GVD is a gigaton volume neutrino telescope currently under construction in Lake Baikal. GV D's detection\, calibration and control units are submerged between the de pths of 730 and 1275 meters and are equipped with sensors allowing for mon itoring the state of individual components. Spatial configuration of the e ntire detector is obtained using an acoustic positioning system consisting of an array of acoustic modems installed along the strings of the detecto r. We describe a data pipeline used to collect\, store and process the mon itoring and positioning data in Baikal-GVD.\n\nhttps://indico.ific.uv.es/e vent/3965/contributions/14766/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14766/ END:VEVENT BEGIN:VEVENT SUMMARY:Data Quality Monitoring system of the Baikal-GVD experiment DTSTART;VALUE=DATE-TIME:20210518T164000Z DTEND;VALUE=DATE-TIME:20210518T170000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14761@indico.ific.uv.es DESCRIPTION:Speakers: Maksim Sorokovikov (JINR)\nThe main purpose of the B aikal-GVD Data Quality Monitoring (DQM) system is to verify the detector s tatus and collected data in both on- and off-line modes. Besides the quali ty estimation of the obtained data and providing the charge calibration us ing recorded signals the system efficiently performs validation of the tri gger thresholds\, as well as the monitoring of the environmental noise lev els and trigger system quality. The DQM system is integrated within the Ba ikal-GVD’s unified software framework (“BARS”) and its GUI interface is used for the DQM shifts. This allows us to correct promptly and effect ively the telescope conditions.\n\nhttps://indico.ific.uv.es/event/3965/co ntributions/14761/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14761/ END:VEVENT BEGIN:VEVENT SUMMARY:GiBUU based neutrino interaction simulations in KM3NeT DTSTART;VALUE=DATE-TIME:20210518T154000Z DTEND;VALUE=DATE-TIME:20210518T160000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14779@indico.ific.uv.es DESCRIPTION:Speakers: Johannes Schumann (ECAP - Universität Erlangen-Nür nberg)\nThe simulation of the neutrino interaction vertex is a crucial ste p for the simulation chain of a neutrino experiment. The different process es taking part in the neutrino scattering at a nucleus require several app roximations in order to make the simulation possible and to realize reason able computation times. This can be realised in different ways\, e.g. by p arametrised models for the different scattering processes and energy regim es as it is implemented in GENIE. The GiBUU neutrino generator utilises th e Boltzmann-Ueling-Uhlenbeck equation to simulate the particle flow after the neutrino interactions\, i.e. the final state interctions. This talk hi ghlights the KM3BUU project\, which is a Python wrapper for GiBUU with add itional functionalities related to the KM3NeT data formats. The detector s pecific results in form of the visible energy in the detector after the li ght propagation simulation and the KM3NeT event reconstruction are present ed. In addition to that\, the comparison to the GENIE based simulation env ironment in KM3NeT (gSeaGen) is drawn.\n\nhttps://indico.ific.uv.es/event/ 3965/contributions/14779/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14779/ END:VEVENT BEGIN:VEVENT SUMMARY:Upgrading gSeaGen: from MeV to PeV neutrinos DTSTART;VALUE=DATE-TIME:20210518T152000Z DTEND;VALUE=DATE-TIME:20210518T154000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14778@indico.ific.uv.es DESCRIPTION:Speakers: Alfonso Andres Garcia Soto (NIKHEF)\nThe gSeaGen fra mework has been upgraded to simulate events detectable in neutrino telesco pes induced by neutrino or cosmic ray interactions. The new version is wel l-suited to generate neutrino interactions at energies from a few MeV to E eV\, profiting from the latest GENIE extensions to lower and higher energi es. In addition\, a brand new functionally to propagate leptons from CORSI KA air showers has been developed. Novel features of gSeaGen will be prese nted\, related to simulation of PeV tau neutrinos and charged lepton propa gation\, using the KM3NeT detectors as physics case.\n\nhttps://indico.ifi c.uv.es/event/3965/contributions/14778/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14778/ END:VEVENT BEGIN:VEVENT SUMMARY:Recent advances in the low-energy atmospheric neutrino flux modell ing with the MCEq code DTSTART;VALUE=DATE-TIME:20210518T150000Z DTEND;VALUE=DATE-TIME:20210518T152000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14937@indico.ific.uv.es DESCRIPTION:Speakers: Tetiana Kozynets (NBI)\nAn accurate atmospheric neut rino flux is crucial for a multitude of physics studies with modern neutri no telescopes\; as a signal for neutrino oscillation measurements\, and as a background for searches of astrophysical neutrino sources. We seek to a dvance in the low-energy neutrino flux calculations (up to a few GeV) usin g the MCEq (Matrix Cascade Equations) code that numerically solves the one -dimensional cascade equations. For precision calculations at energies bel ow a few GeV\, which are well within reach of the IceCube Upgrade and KM3N eT-ORCA\, the lateral component of hadronic cascades becomes important\, r equiring three-dimensional calculation schemes. We present a new study on the two-dimensional development of air showers within the MCEq framework a s a necessary initial step towards a full 3D calculation. Since the uncert ainties of the flux calculations are limited by the physics models\, in pa rticular the currently available hadronic interaction models\, we will dis cuss the prospects of moving forward using data-driven models and calibrat ion techniques.\n\nhttps://indico.ific.uv.es/event/3965/contributions/1493 7/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14937/ END:VEVENT BEGIN:VEVENT SUMMARY:The Future of High-Energy Astrophysical Neutrino Flavor Measuremen ts DTSTART;VALUE=DATE-TIME:20210520T170000Z DTEND;VALUE=DATE-TIME:20210520T172000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14868@indico.ific.uv.es DESCRIPTION:Speakers: Ningqiang Song (Queen's University)\nThe next genera tion of neutrino telescopes\, including Baikal-GVD\, KM3NeT\, P-ONE\, TAMB O\, and IceCube-Gen2\, will be able to determine the flavor of high-energy astrophysical neutrinos with 10% uncertainties. With the aid of future ne utrino oscillation experiments --- in particular JUNO\, DUNE\, and Hyper-K amiokande --- the regions of flavor composition at Earth that are allowed by neutrino oscillations will shrink by a factor of ten between 2020 and 2 040. We critically examine the ability of future experiments and show how these improvements will help us pin down the source of high-energy astroph ysical neutrinos and a sub-dominant neutrino production mechanism with and without unitarity assumed. As an illustration of beyond-the-Standard-Mode l physics\, we also show that the future neutrino measurements will constr ain the decay rate of heavy neutrinos to be below $2\\times 10^{-5}~$$m$/e V/s assuming they decay into invisible particles.\n\nhttps://indico.ific.u v.es/event/3965/contributions/14868/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14868/ END:VEVENT BEGIN:VEVENT SUMMARY:Progress in Solar Atmospheric Neutrino Searches with 9 Years of Ic eCube Data DTSTART;VALUE=DATE-TIME:20210518T170000Z DTEND;VALUE=DATE-TIME:20210518T172000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14873@indico.ific.uv.es DESCRIPTION:Speakers: Joshua Villarreal (Harvard University)\nCosmic rays interact with nucleons in the solar atmosphere to create pions\, kaons\, a nd other particles which decay to produce a flux of high-energy neutrinos. Although this flux is predicted in the literature\, it has yet to be obse rved experimentally. This flux is an irreducible background for current so lar WIMP searches. The detection of these neutrinos would improve the sens itivity floor for these searches\, and would allow neutrino telescopes to measure neutrinos in yet-unprobed oscillation regimes\, characterized by a ratio of baseline to the energy of L/E~1e5km/GeV. In this contribution\, we will present recent progress in a new IceCube analysis optimized to det ect solar atmospheric neutrinos.\n\nhttps://indico.ific.uv.es/event/3965/c ontributions/14873/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14873/ END:VEVENT BEGIN:VEVENT SUMMARY:All-flavour search for a diffuse cosmic neutrino flux with ANTARES DTSTART;VALUE=DATE-TIME:20210521T135000Z DTEND;VALUE=DATE-TIME:20210521T141000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14870@indico.ific.uv.es DESCRIPTION:Speakers: Luigi Antonio Fusco (CPPM\, Marseille)\nThe ANTARES neutrino telescope\, located in the Mediterranean Sea\, is the longest-ope rated under-sea neutrino detector\, having collected data for more than 14 years and since 2008 in its full configuration. These data have been used to search for a diffuse flux of cosmic neutrinos\, upgrading previously p ublished results both in terms of livetime and in search method. In partic ular\, a new event selection strategy\, developed for the study of the atm ospheric neutrino flux\, allows a further rejection of atmospheric foregro unds\, thus enabling a considerable reduction of previous systematic uncer tainties connected with the background estimation . The results of this ne w analysis are reported in this contribution.\n\nhttps://indico.ific.uv.es /event/3965/contributions/14870/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14870/ END:VEVENT BEGIN:VEVENT SUMMARY:Sensitivity estimates for diffuse\, point-like and extended neutri no sources with KM3NeT/ARCA DTSTART;VALUE=DATE-TIME:20210521T141000Z DTEND;VALUE=DATE-TIME:20210521T143000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14871@indico.ific.uv.es DESCRIPTION:Speakers: Rasa Muller (PhD\, Nikhef)\nThe identification of co smic objects emitting high energy neutrinos could provide new insights abo ut the Universe and its active sources. The existence of these cosmic neut rinos has been proven by the IceCube collaboration\, but the big question of which sources these neutrinos originate from\, remains unanswered. The KM3NeT detector for Astroparticle Research with Cosmics in the Abyss (ARCA )\, with a cubic kilometer instrumented volume\, is currently being built in the Mediterranean Sea. It will excel at identifying cosmic neutrino sou rces due to its unprecedented angular resolution for muon neutrinos ( 10 T eV events). KM3NeT has a view of the sky complementary to IceCube\, and is sensitive to neutrinos across a wide range of energies. In order to ident ify the signature of cosmic neutrino sources in the background of atmosphe ric neutrinos and muons\, statistical methods are being developed and test ed with Monte-Carlo pseudo-experiments. This contribution presents the mos t recent sensitivity estimates for diffuse\, point-like and extended neutr ino sources with KM3NeT/ARCA.\n\nhttps://indico.ific.uv.es/event/3965/cont ributions/14871/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14871/ END:VEVENT BEGIN:VEVENT SUMMARY:Detection of a neutrino event at the Glashow resonance with IceCub e DTSTART;VALUE=DATE-TIME:20210521T133000Z DTEND;VALUE=DATE-TIME:20210521T135000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14875@indico.ific.uv.es DESCRIPTION:Speakers: Christian Haack ()\nThe Glashow resonance describes the resonant production of a W− boson during\nthe interaction of an elec tron antineutrino with an electron.\nThe cross-section of this process pea ks at an antineutrino energy of 6.3 petaelectronvolts (PeV) in the rest fr ame of the electron.\nIn this talk\, I will report on the observation by t he IceCube Neutrino Observatory of a neutrino-induced particle shower with a deposited energy of ~6 PeV. A detailed study of the event revealed feat ures in the PMT waveforms\, which are consistent with the production of se condary muons in the particle shower. While these muons confirm the hadron ic nature of the particle shower - as expected from the decay of a W- boso n -\,they also enable an independent verification of the directional recon struction of the primary neutrino. \nThis evidence for the Glashow resonan ce demonstrates the presence of electron antineutrinos in the astrophysica l flux.\nWhile currently limited by statistics\, this work demonstrates th e feasibility of measuring the astrophysical anti-electron neutrino flux i n future neutrino telescopes. By disentangling neutrinos from antineutrino s\, it becomes possible to distinguish astronomical accelerators that prod uce neutrinos via hadronuclear or photohadronic interactions with or witho ut strong magnetic fields.\n\nhttps://indico.ific.uv.es/event/3965/contrib utions/14875/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14875/ END:VEVENT BEGIN:VEVENT SUMMARY:Observations of muon neutrinos with Baikal-GVD DTSTART;VALUE=DATE-TIME:20210520T164000Z DTEND;VALUE=DATE-TIME:20210520T170000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14869@indico.ific.uv.es DESCRIPTION:Speakers: Dmitry Zaborov (INR RAS\, Moscow\, Russia)\nThe Baik al-GVD detector currently consists of 2016 optical modules arranged on 56 vertical strings in a water volume of 0.35 km$^3$. The data from the parti ally complete array have been analyzed using a $\\chi^2$-based track recon struction algorithm. After a zenith angle cut and other background suppres sion cuts\, a sample of upgoing neutrino candidate events is obtained. The analysis is optimized for the detection of muon neutrinos and muon anti-n eutrinos in the multi-TeV energy regime. The observed characteristics of t he neutrino candidate sample are compared with Monte Carlo predictions for the atmospheric neutrinos.\n\nhttps://indico.ific.uv.es/event/3965/contri butions/14869/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14869/ END:VEVENT BEGIN:VEVENT SUMMARY:The Baikal-GVD neutrino telescope: search for high-energy cascade DTSTART;VALUE=DATE-TIME:20210520T162000Z DTEND;VALUE=DATE-TIME:20210520T164000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14872@indico.ific.uv.es DESCRIPTION:Speakers: Mark Shelepov ()\nBaikal-GVD is a next generation\, kilometer-scale neutrino telescope currently under construction in Lake Ba ikal. GVD is formed by multi-megaton subarrays (clusters) and is designed for the detection of astrophysical neutrino fluxes at energies from a few TeV up to 100 PeV. The design of Baikal-GVD allows one to search for astro physical neutrinos with flux values measured by IceCube already at early p hases of the array construction. We present here preliminary results of th e search for high-energy neutrinos via the cascade mode with the Baikal-GV D neutrino telescope.\n\nhttps://indico.ific.uv.es/event/3965/contribution s/14872/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14872/ END:VEVENT BEGIN:VEVENT SUMMARY:Astrophysical Neutrino Source Searches with IceCube Starting Track Events DTSTART;VALUE=DATE-TIME:20210520T160000Z DTEND;VALUE=DATE-TIME:20210520T162000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14874@indico.ific.uv.es DESCRIPTION:Speakers: Sarah Mancina ()\nMuons and neutrinos created by cos mic rays interacting in the atmosphere create a significant background for IceCube astrophysical neutrinos in the southern sky. However\, looking fo r neutrino events that start in the detector can reduce both the atmospher ic muon and atmospheric neutrino background while retaining the astrophysi cal neutrino signal. The method presented here results in a higher astroph ysical neutrino purity for IceCube events at declinations less than -25°. We specifically select for track events\, which results in better directi onal reconstruction due to the long path the muon leaves in the detector t han for cascade events. Due to the reduced background and good pointing re solution\, we will discuss how this event selection will improve IceCube's sensitivity to southern neutrino sources. We will focus on its impact on searches for galactic plane point sources and diffuse galactic plane neutr ino emission. This selection also allows IceCube to send out high astrophy sical purity realtime alert events with neutrino energies in the tens of T eV to the multimessenger community.\n\nhttps://indico.ific.uv.es/event/396 5/contributions/14874/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14874/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutrinos from galactic sources DTSTART;VALUE=DATE-TIME:20210520T150000Z DTEND;VALUE=DATE-TIME:20210520T152000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14882@indico.ific.uv.es DESCRIPTION:Speakers: Niro Viviana ()\nThe HAWC telescopes has recently re vealed new spectra for gamma-ray sources in the Galactic plane. In this ta lk I will review the possibility of detecting these sources at KM3 detecto rs. I will consider\, with particular emphasis\, the 2HWC J1825-134 source . Amongst the HAWC sources\, it is indeed the most luminous in the multi-T eV domain and\ntherefore is one of the first that should be searched for w ith a neutrino telescope in the northern hemisphere. I will show the prosp ects to detect this source at the KM3NeT detector and comment on the possi bilities for others neutrino telescopes. \nI will consider\, moreover\, th e gamma-ray sources eHWC J1907+063\, eHWC J2019+368 and 2HWC J1857+027. Fo r these sources\, I will show the prediction for neutrinos at the IceCube detector\, presenting the calculation of the statistical significance\, co nsidering 10 and 20 years of running time\, and I will comment on the curr ent results reported by the collaboration.\n\nhttps://indico.ific.uv.es/ev ent/3965/contributions/14882/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14882/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for high-energy neutrino emission from hard X-ray AGN DTSTART;VALUE=DATE-TIME:20210520T154000Z DTEND;VALUE=DATE-TIME:20210520T160000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14883@indico.ific.uv.es DESCRIPTION:Speakers: Sreetama Goswami (University of Alabama)\nThe IceCub e Neutrino Observatory has detected high-energy astrophysical\nneutrinos i n the TeV-PeV range. These neutrinos have an isotropic\ndistribution on th e sky\, and therefore likely originate from extragalactic\nsources. Active Galactic Nuclei (AGN) form a class of astronomical objects\nwhich are pro mising neutrino source candidates given their high\nelectromagnetic lumino sity and potential ability to accelerate cosmic rays\nup to energies large r than 1016 eV. Interactions of these cosmic rays\nwithin the AGN environm ent are expected to produce both neutrinos and\npionic gamma rays. Some ha dronic models of AGN emission suggest that such\ngamma rays can in turn in teract with the dense photon fields of AGN and\ncascade down to hard X-ray s and MeV gamma rays. We present an update on the\nIceCube stacking analys is searching for high-energy neutrinos from hard\nX-ray sources sampled fr om the *Swift*-BAT AGN Spectroscopic Survey (BASS).\n\nhttps://indico.ific .uv.es/event/3965/contributions/14883/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14883/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for an association between neutrinos and radio-selected bla zars with ANTARES DTSTART;VALUE=DATE-TIME:20210520T152000Z DTEND;VALUE=DATE-TIME:20210520T154000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14881@indico.ific.uv.es DESCRIPTION:Speakers: Julien Aublin (APC\, Université de Paris)\nRecently \, evidence for an association between high energy neutrinos detected by\n IceCube and radio-selected blazars has been found by Plavin et al. (2020\, 2021). This result was achieved using an all sky complete sample of 3411 blazars selected on their parsec-scale flux density at 8 GHz higher than 1 50 mJy. We perform an analysis using the same sample of radio-selected bla zars and search for a positional correlation with the astrophysical neutri no candidates selected for point source searches from the data collected b y the ANTARES detector between January 29\, 2007 and February 28\, 2020.\n First results of this search are presented and discussed.\n\nhttps://indic o.ific.uv.es/event/3965/contributions/14881/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14881/ END:VEVENT BEGIN:VEVENT SUMMARY:New Physics in the Lepton sector from future Neutrino experiments DTSTART;VALUE=DATE-TIME:20210520T164000Z DTEND;VALUE=DATE-TIME:20210520T170000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14768@indico.ific.uv.es DESCRIPTION:Speakers: Davide Meloni (Dipartimento Matematica e Fisica\, Un iversita' di RomaTre)\nThe phenomenon of Neutrino Oscillation has been ver y well confirmed by a plethora of data\; we are now entering a precision e ra in which the mixing angles and mass differences are going to be measure d with unprecedented precision by ongoing and planned experiments. However \, the new measurements could reveal that the standard three flavor scenar io is not enough for a complete description of oscillations and a new para digm beyond the standard physics in the lepton sector must be invoked. In this talk I will review the current experimental situation on neutrino mas ses and mixing and discuss some example of physics beyond the Standard Mod el that could show up in the next years.\n\nhttps://indico.ific.uv.es/even t/3965/contributions/14768/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14768/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for non-standard neutrino interactions with ANTARES and KM3 NeT/ORCA DTSTART;VALUE=DATE-TIME:20210520T162000Z DTEND;VALUE=DATE-TIME:20210520T164000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14770@indico.ific.uv.es DESCRIPTION:Speakers: Nafis Rezwan Khan Chowdhury (IFIC\, Valencia)\nNon-s tandard interactions (NSIs) in the propagation of neutrinos in matter can lead to significant deviations in neutrino oscillations expected within th e standard neutrino oscillation framework. These additional interactions w ould result into an anomalous flux of neutrinos discernible at neutrino te lescopes. The ANTARES detector and its next-generation successor\, KM3NeT\ , located in the Mediterranean Sea\, have the potential to measure sub-dom inant effects in neutrino oscillations\, coming from non-standard neutrino interactions.\n\nIn this presentation\, a likelihood-based search for NSI s with 10 years of atmospheric muon-neutrino data recorded with ANTARES wi ll be reported and sensitivity projections for KM3NeT/ORCA (ORCA being the low energy sub-array of KM3NeT)\, based on up-to-date simulations\, will be shown. The phenomenological consequence of NSIs on the neutrino mass or dering (NMO) measurement at ORCA will be addressed as well. Remarkably\, t he bounds obtained with ANTARES in the NSI $\\mu - \\tau$ sector constitut e the most stringent limits up to date.\n\nhttps://indico.ific.uv.es/event /3965/contributions/14770/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14770/ END:VEVENT BEGIN:VEVENT SUMMARY:Current status of neutrino masses and mixing DTSTART;VALUE=DATE-TIME:20210520T150000Z DTEND;VALUE=DATE-TIME:20210520T152000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14771@indico.ific.uv.es DESCRIPTION:Speakers: Christoph Andreas Ternes (INFN Torino)\nIn this talk I present the results from our global fit to neutrino oscillation data. N eutrino oscillation experiments have reached a very good level in precisio n. Due to correlations among parameters a global fit combining many differ ent datasets can give more precise results than a single experiment on its own. I will present the results of the latest global fit performed by our group and focus on the remaining unknowns in the standard picture: Atmosp heric octant\, CP violation and neutrino mass ordering.\n\nhttps://indico. ific.uv.es/event/3965/contributions/14771/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14771/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutrino mass ordering determination through combined analysis wit h JUNO and KM3NeT/ORCA DTSTART;VALUE=DATE-TIME:20210520T154000Z DTEND;VALUE=DATE-TIME:20210520T160000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14772@indico.ific.uv.es DESCRIPTION:Speakers: Nhan Chau (APC)\nThe determination of neutrino mass ordering (NMO) is one of the prime goals of several neutrino experiments. KM3NeT/ORCA and JUNO are two next-generation neutrino oscillation experime nts both aiming at addressing this question. ORCA can determine the NMO by probing Earth matter effects on the oscillation of atmospheric neutrinos in the GeV energy range. JUNO\, on the other hand\, is sensitive to the NM O by investigating the interference effects of fast oscillations in the re actor electron antineutrino spectrum at medium baseline.\n\nThis talk pres ents the potential of determining the NMO through a combined analysis of J UNO and ORCA data. When measuring the $\\Delta m^2_{31}$ with a wrong orde ring assumption\, the best-fit values are different between the two experi ments. This tension\, together with good constraints on the $\\Delta m^2_{ 31}$ measurement by both experiments\, enhances the combined NMO sensitivi ty beyond the simple sum of their sensitivities. The analysis shows that $ 5\\sigma$ significance is reachable in less than 2 years of data taking wi th both experiments for true normal neutrino mass ordering assuming curren t global best-fit values of the oscillation parameters\, while 6 years wil l be needed for any other parameter set.\n\nhttps://indico.ific.uv.es/even t/3965/contributions/14772/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14772/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for a Astrophysical Neutrino Suppression due to Dark Matter Neutrino Scattering with IceCube DTSTART;VALUE=DATE-TIME:20210520T170000Z DTEND;VALUE=DATE-TIME:20210520T172000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14736@indico.ific.uv.es DESCRIPTION:Speakers: Adam McMullen (Queen's University)\nNumerous astroph ysical and cosmological experiments have observed the effects of dark matt er\, however\, its properties have yet to be discovered. Simultaneously\, the nature of high-energy astrophysical neutrinos detected by IceCube rema ins unresolved. If dark matter and neutrinos are coupled to each other\, t hey may exhibit a non-zero elastic scattering cross section. Such an inter action between an isotropic extragalactic neutrino flux and dark matter wo uld be concentrated in the Galactic Centre\, where the dark matter column density is greatest. This scattering would attenuate the flux of high-ener gy neutrinos\, which could be observed in IceCube. Using the seven-year Me dium Energy Starting Events (MESE) sample\, we perform an unbinned likelih ood analysis\, searching for a signal based on four possible DM-neutrino i nteraction scenarios. We search for a suppression of the high-energy astro physical neutrino flux in the direction of the Galactic Centre\, and compa re these constraints to complementary low-energy information from large sc ale structure surveys and the cosmic microwave background.\n\nhttps://indi co.ific.uv.es/event/3965/contributions/14736/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14736/ END:VEVENT BEGIN:VEVENT SUMMARY:Recent neutrino oscillation results from IceCube/DeepCore DTSTART;VALUE=DATE-TIME:20210520T152000Z DTEND;VALUE=DATE-TIME:20210520T154000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14939@indico.ific.uv.es DESCRIPTION:Speakers: Wing Yan Ma (DESY)\nThe IceCube neutrino observatory \, along with its DeepCore in-fill array\, detects a large amount of atmos pheric and astrophysical neutrinos across a wide range of energies from Ge V to PeV. DeepCore is sensitive in measuring neutrino oscillation paramete rs using events in GeV-TeV range. This talk will present an update of muon neutrino disappearance analysis using 8 years of DeepCore data\, using a fast and robust reconstruction tool to select a sample of high quality eve nts. An outlook for upcoming results from both a higher statistics data sa mple from DeepCore and the future IceCube Upgrade will also be presented.\ n\nhttps://indico.ific.uv.es/event/3965/contributions/14939/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14939/ END:VEVENT BEGIN:VEVENT SUMMARY:Update on the IceCube High Energy Non-Standard Interactions Analys is DTSTART;VALUE=DATE-TIME:20210520T160000Z DTEND;VALUE=DATE-TIME:20210520T162000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14866@indico.ific.uv.es DESCRIPTION:Speakers: Grant Parker (University of Texas at Arlington)\nThe existence of neutrino masses and tensions between measurements of neutrin o mixing parameters indicates there is new physics yet to be discovered. A viable explanation for these discrepancies are non-standard interactions (NSI)— subdominant neutrino-quark interactions not described by the Sta ndard Model (SM). A portion of neutrinos detected by IceCube travel throu gh distances of Earth’s matter near the oscillation length\, making IceC ube particularly sensitive to flavor-changing\, neutral current NSI. Here we report progress on an IceCube NSI search employing a sample of high en ergy (>100GeV)\, upgoing muon tracks to constrain NSI that alter muon-tau neutrino oscillations.\n\nhttps://indico.ific.uv.es/event/3965/contributio ns/14866/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14866/ END:VEVENT BEGIN:VEVENT SUMMARY:Status of IceCube Searches for Sterile Neutrinos DTSTART;VALUE=DATE-TIME:20210519T152000Z DTEND;VALUE=DATE-TIME:20210519T154000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14940@indico.ific.uv.es DESCRIPTION:Speakers: Benjamin Smithers (University of Texas\, Arlington)\ nExisting anomalies in experimental results\, for neutrino oscillation exp eriments\, may require a fourth\, “sterile” neutrino with non-interact ing flavor states. Recent sterile neutrino results from the IceCube South Pole Neutrino Observatory\, a Cherenkov neutrino experiment using a cubic kilometer of instrumented ice\, are presented. Multiple analyses are discu ssed\, including one enabled by a matter-enhanced resonance occurring for a sterile neutrino with eV$^{2}$-scale mass-squared differences. We introd uce possible future analyses involving the use of new event topologies as a means of searching for neutrino appearance with non-zero $\\theta_{34}$. \n\nhttps://indico.ific.uv.es/event/3965/contributions/14940/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14940/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for eV-scale sterile neutrinos with 8 years of IceCube Deep Core data DTSTART;VALUE=DATE-TIME:20210519T154000Z DTEND;VALUE=DATE-TIME:20210519T160000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14867@indico.ific.uv.es DESCRIPTION:Speakers: Alexander Trettin (DESY)\nSeveral anomalies in react or and accelerator neutrino experiments motivate the search for sterile ne utrinos at mass splittings in the eV-scale. We present an analysis that pr obes the elements $U_{\\mu4}$ and $U_{\\tau4}$ of the extended (3+1) neutr ino mixing matrix using an 8 year data sample from IceCube’s DeepCore su b-array containing atmospheric neutrinos between 5 and 300 GeV. The analys is is expected to produce world leading limits on $|U_{\\mu4}|$ and $|U_{\ \tau4}|$ under the assumption of sterile mass splittings between 1 and 100 eV$^{2}$\, as well as limits on $|U_{\\mu4}|$ for sterile mass splittings below 1 eV$^{2}$. We specifically discuss how we overcame the challenges of efficiently calculating neutrino oscillation probabilities in the prese nce of very fast sterile oscillations as well as the impact of the additio nal sterile CP-violating phase $\\delta_{24}$\n\nhttps://indico.ific.uv.es /event/3965/contributions/14867/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14867/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for light sterile neutrinos with ANTARES and KM3NeT/ORCA te lescopes DTSTART;VALUE=DATE-TIME:20210519T150000Z DTEND;VALUE=DATE-TIME:20210519T152000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14769@indico.ific.uv.es DESCRIPTION:Speakers: Alba Domi (University of Genoa - INFN\, Genoa\, Ital y)\nThe standard model with three flavor neutrino oscillations is supporte d by the majority of neutrino oscillation data. However\, a few experiment s have observed anomalies\, which are difficult to accommodate within the three flavour framework. One possible explanation of some anomalies is to postulate the existence of light sterile neutrinos.\nNeutrino telescopes s uch as ANTARES and KM3NeT are promising detectors to probe the sterile neu trino hypothesis using atmospheric neutrinos. ANTARES is the largest deep- sea neutrino telescope\, located in the Mediterranean Sea\, in operation s ince 2008 in its full configuration. KM3NeT\, now under construction in th e Mediterranean Sea\, is a next-generation network of water Cherenkov dete ctors. When completed\, it will consist of two separate building blocks: A RCA (Astroparticle Research with Cosmics in the Abyss)\, optimized for hig h-energy neutrino astronomy\, and ORCA (Oscillation Research with Cosmics in the Abyss) designed for neutrino oscillation studies in the GeV energy range. In this contribution\, upper limits with 10 years of ANTARES data a nd ORCA sensitivities to the active-sterile mixing angles (θ14\, θ24\, θ34) in the (3+1) flavor model are presented.\n\nhttps://indico.ific.uv.e s/event/3965/contributions/14769/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14769/ END:VEVENT BEGIN:VEVENT SUMMARY:Nuclearite search with ANTARES DTSTART;VALUE=DATE-TIME:20210519T162000Z DTEND;VALUE=DATE-TIME:20210519T164000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14894@indico.ific.uv.es DESCRIPTION:Speakers: Mohammed Bouta (LPMR)\nANTARES is a Cherenkov underw ater neutrino telescope operating in the Mediterranean Sea since 2008 in i ts full configuration. Even though optimised for the search of cosmic neut rinos\, this telescope is also sensitive to nuclearites of strange matter. \n\nWe discuss here the possible detection of non-relativistic down-going nuclearites with the ANTARES telescope and present the first results of an updated analysis using data collected in the period 2009-2017.\n\nhttps:/ /indico.ific.uv.es/event/3965/contributions/14894/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14894/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for Magnetic Monopoles with ten years of ANTARES data DTSTART;VALUE=DATE-TIME:20210519T164000Z DTEND;VALUE=DATE-TIME:20210519T170000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14803@indico.ific.uv.es DESCRIPTION:Speakers: Jihad Boumaaza (Antares/Km3NeT)\nThe present study i s an updated search for magnetic monopoles using data taken with the ANTAR ES neutrino telescope over a period of 10 years (January 2008 to December 2017). In accordance with some grand unification theories\, magnetic monop oles could have been created during the phase of symmetry breaking in the early Universe\, and accelerated by galactic magnetic fields. As a consequ ence of their high energy\, they could cross the Earth and emit a signific ant signal in a Cherenkov-based telescope like ANTARES\, for appropriate m ass and velocity ranges. This analysis uses a run-by-run simulation strate gy\, as well as a new simulation of magnetic monopoles taking into account the Kasama\, Yang and Goldhaber cross section. The results obtained for r elativistic magnetic monopoles with velocity v ≥ 0.57c will be presented .\n\nhttps://indico.ific.uv.es/event/3965/contributions/14803/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14803/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for nuclearites with the KM3NeT detector DTSTART;VALUE=DATE-TIME:20210519T160000Z DTEND;VALUE=DATE-TIME:20210519T162000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14896@indico.ific.uv.es DESCRIPTION:Speakers: Alice Paun (Institute of Space Science (ISS)\, Atomi stilor 409\, Magurele\, RO-077125 Romania)\nStrange quark matter (SQM) is a hypothetical type of matter composed of almost equal quantities of up\, down and strange quarks. Massive SQM particles are called nuclearites. Nuc learites with masses greater than $10^{13}$ GeV and velocities of about 25 0 km/s (typical galactic velocities) could reach the Earth and interact wi th atoms and molecules of sea water within the sensitive volume of the dee p-sea neutrino telescopes. The SQM particles can be detected with the KM3N eT telescope (whose first lines are already installed in the Mediterranean Sea and taking data) through the visible blackbody radiation generated al ong their path inside or near the instrumented area. In this work the resu lts of a study using Monte Carlo simulations of down-going nuclearites are discussed. Preliminary sensitivities of the KM3NeT experiment for a flux of nuclearites are also presented.\n\nhttps://indico.ific.uv.es/event/3965 /contributions/14896/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14896/ END:VEVENT BEGIN:VEVENT SUMMARY:Magnetic monopole searches with IceCube DTSTART;VALUE=DATE-TIME:20210519T170000Z DTEND;VALUE=DATE-TIME:20210519T172000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14926@indico.ific.uv.es DESCRIPTION:Speakers: Anna Pollmann ()\nMagnetic monopoles are hypothetica l particles carrying magnetic charge. They are predicted to exist in most extensions of the Standard Model of particle physics. A wide range of mass es is allowed for magnetic monopoles\, leading to a broad speed range for a hypothetical flux of these relics of the Big Bang. A magnetic monopole p assing through IceCube would produce light through several different physi cal processes depending on its speed. \nAn overview will be given of the m ethods and results of current and recently finished searches for magnetic monopoles in IceCube. A focus will be put on the two most recent searches for magnetic monopoles: firstly\, a search above the Cherenkov threshold i n ice where the dominant background consists of rare\, extremely high ener gy astrophysical neutrinos. Secondly the first search for monopoles induci ng luminescence light at low relativistic speeds. New limits were obtained which exceed previous analyses by orders of magnitudes.\n\nhttps://indico .ific.uv.es/event/3965/contributions/14926/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14926/ END:VEVENT BEGIN:VEVENT SUMMARY:Decaying Dark Matter at IceCube and its Signature in High-Energy G amma-Ray Experiments DTSTART;VALUE=DATE-TIME:20210518T150000Z DTEND;VALUE=DATE-TIME:20210518T152000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14808@indico.ific.uv.es DESCRIPTION:Speakers: Barbara Skrzypek (Harvard University)\nObservations of high-energy astrophysical neutrinos in IceCube have opened the door to multi-messenger astronomy\, by way of which questions in particle physics could be explored collaboratively between IceCube and optical experiments such as Fermi-LAT. However\, the origin of these astrophysical neutrinos i s still largely unknown. Among the tensions that still need to be resolved \, for example\, is the excess of neutrinos in the High Energy Starting Ev ent (HESE) sample in the energy range of 40-200 TeV\, a contribution that could come from dark matter decay. The dark matter decay hypothesis can be tested through comparisons with Fermi-LAT gamma-ray data. In particular\, HESE predicts a soft neutrino spectrum that extends below around 50 TeV\, but such a spectrum is incompatible with current gamma ray measurements a nd suggests that gamma-rays become heavily suppressed for sources dominati ng in this lower-energy range. A reason for this is that properties of the traversed medium\, which consists of extragalactic background light (EBL) \, the cosmic microwave background (CMB)\, and the intergalactic magnetic field\, significantly alter the final gamma ray spectrum that reaches tele scopes on Earth. The existence of competing EBL models\, moreover\, compli cates estimates of dark matter constraints. In this presentation\, we addr ess these questions by studying the impact that the EBL has on indirect me asurements of dark matter decay. I present my predictions for galactic\, i nverse-Compton\, and extragalactic gamma-ray spectra undergoing attenuatio n by different EBL models.\n\nhttps://indico.ific.uv.es/event/3965/contrib utions/14808/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14808/ END:VEVENT BEGIN:VEVENT SUMMARY:Indirect search for dark matter in the Galactic Centre with IceCub e DTSTART;VALUE=DATE-TIME:20210518T154000Z DTEND;VALUE=DATE-TIME:20210518T160000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14802@indico.ific.uv.es DESCRIPTION:Speakers: Nadège Iovine (Université Libre de Bruxelles)\nNeu trino telescopes\, such as IceCube\, can be used to conduct indirect dark matter searches. A common assumption is that dark matter consists of Weakl y Interacting Massive Particles (WIMPs)\, which are expected to produce st andard model particles when they annihilate or decay. IceCube could then d etect the neutrinos generated by these standard model particles. Since the Milky Way is expected to be immersed in a dark matter halo whose density increases towards its centre\, the Galactic Centre is a designated target for indirect searches. In this contribution\, we present the sensitivities of the search for dark matter in the Galactic Centre based on IceCube dat a\, probing annihilation through $\\nu\\bar{\\nu}$\, $\\mu^{+}\\mu^-$\, $\ \tau^{+}\\tau^-$\, $W^{+}W^-$ and $b\\bar{b}$. The sensitivities presented here show considerable improvements when compared to results from previou s IceCube searches and other neutrino telescopes in the energy range consi dered.\n\nhttps://indico.ific.uv.es/event/3965/contributions/14802/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14802/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for dark matter from the center of the Earth with 8 years o f IceCube data DTSTART;VALUE=DATE-TIME:20210518T164000Z DTEND;VALUE=DATE-TIME:20210518T170000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14804@indico.ific.uv.es DESCRIPTION:Speakers: Giovanni Renzi (Université Libre de Bruxelles)\nNeu trinos have been proved to be unique messengers in the understanding of fu ndamental physics processes\, particularly in the astrophysics field. Also \, they are thought to be able to provide hints of physics beyond the Stan dard Model\, like Dark Matter models\, among which those based on Weakly I nteracting Massive Particles (WIMPs) physics. This kind of Dark Matter can scatter off Standard Matter nuclei in the vicinity of massive bodies such as the Sun or the Earth\, lose velocity\, and be gravitationally trapped in the center of the body. Self-annihilation of dark matter into Standard Model particles results in a flux of which the final products include neut rinos. For the case of the Earth\, an excess of neutrinos coming from the center of the planet could indicate that the process described is taking p lace. The IceCube Neutrino Observatory\, located at the geographical South Pole\, can detect the neutrino flux described. A search has been conducte d on 8 years of IceCube data\, probing multiple dark matter channels and m asses. The latest sensitivities of this analysis are competitive\, world-l eading in a part of the phase space\, in comparison with previous analyses performed in the field.\n\nhttps://indico.ific.uv.es/event/3965/contribut ions/14804/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14804/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for secluded dark matter with 6 years of IceCube data DTSTART;VALUE=DATE-TIME:20210518T162000Z DTEND;VALUE=DATE-TIME:20210518T164000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14805@indico.ific.uv.es DESCRIPTION:Speakers: Christoph Tönnis (Sungkyunkwan University)\nThe Ice Cube neutrino observatory consists of 5160 photomultiplier-tubes spread am ong 86 vertical strings making a total\ndetector volume of more than a cub ic kilometer. It detects neutrinos via Cherenkov light of\ncharged relativ istic particles from neutrino interactions with the detector volume. In th is\nanalysis we search for secluded dark matter which annihilates into met astable mediator particles that subsequently\ndecay into neutrinos. Regula r signals from dark matter annihilations in \nthe Sun are strongly attenua ted at higher energies due\nto absorption in the solar plasma. Secluded da rk matter models allow the mediator to escape\nthe Sun before producing an y neutrinos\, thereby avoiding attenuation and yielding an enhanced neutri no signal. IceCube is ideal to search\nfor this enhanced high-energy neutr ino signal due to its good sensitivity to high energy neutrinos. We presen t the sensitivities of an analysis of six\nyears of IceCube data looking f or dark matter in the Sun. Mediator lifetimes between\n1 ms to 10 s and da rk matter masses between 100 GeV and 75 TeV are considered in this analysi s.\n\nhttps://indico.ific.uv.es/event/3965/contributions/14805/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14805/ END:VEVENT BEGIN:VEVENT SUMMARY:Solar WIMP Search with 10 Years of IceCube Data DTSTART;VALUE=DATE-TIME:20210518T160000Z DTEND;VALUE=DATE-TIME:20210518T162000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14806@indico.ific.uv.es DESCRIPTION:Speakers: Jeffrey Lazar ()\nThe existence of dark matter (DM) has been well-established by repeated observations probing many length sca les. Although DM is expected to comprise the majority of the current matte r content of the Universe\, its nature remains unknown. Weakly interacting massive particles (WIMPs) are a class of DM that arise naturally from Sta ndard Model (SM) extensions. Generically WIMPs have a non-zero cross-secti on with SM nuclei\, which allows them to scatter off nuclei in large celes tial bodies such as the Sun\, losing energy and becoming gravitationally b ound in the process. After repeated scatterings\, WIMPs will eventually si nk to the solar center\, leading to an excess of WIMPs there. For sufficie ntly high densities\, WIMPS will annihilate to stable SM particles\, eithe r directly or through a decay chain of unstable SM particles. Among stable SM particles\, only neutrinos can escape the dense solar core. Thus\, one may look for an excess of neutrinos from the direction of the Sun as evid ence of WIMPs. The IceCube Neutrino Observatory\, which detects Cherenkov radiation of charged particles produced in neutrino interactions\, is espe cially well-suited to such searches since it is sensitive to WIMPs with ma ss in the preferred region for super symmetric extensions of the SM. In th is contribution\, I will present the status of IceCube's most recent solar WIMP search\, which covers the WIMP mass range from 10 GeV to 1 TeV.\n\nh ttps://indico.ific.uv.es/event/3965/contributions/14806/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14806/ END:VEVENT BEGIN:VEVENT SUMMARY:Indirect dark matter searches with neutrinos from the Galactic Cen tre region with the ANTARES and KM3NeT telescopes DTSTART;VALUE=DATE-TIME:20210518T152000Z DTEND;VALUE=DATE-TIME:20210518T154000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14807@indico.ific.uv.es DESCRIPTION:Speakers: Sara Rebecca Gozzini (IFIC)\nAn anomalous flux of ne utrinos produced in hypothetical annihilations or decays of dark matter in side a source would produce a signal observable with neutrino telescopes. As suggested by observations\, a conspicuous amount of dark matter is beli eved to accumulate in the Centre of our Galaxy\, which is in neat visibili ty for the Mediterranean underwater telescopes ANTARES and KM3NeT. Searche s have been conducted with a maximum likelihood method to identify the pre sence of a dark matter signature in the neutrino flux measured by ANTARES. Results of all-flavour searches for WIMPs with masses from 50 GeV/c$^2$ u p to 100 TeV/c$^2$ over the whole operation period from 2007 to 2020 are p resented here. Alternative scenarios which propose a dark matter candidate in the heavy sector extensions of the Standard Model would produce a clea r signature in the ANTARES telescope\, that can exploit its view of the Ga lactic Centre up to high energies. Limits on heavy dark matter decay rates computed using ANTARES public data are also discussed. The presentation o f Galactic Centre searches is completed with ongoing analyses and future p otential of the KM3NeT telescope\, in phased construction in the Mediterra nean Sea.\n\nhttps://indico.ific.uv.es/event/3965/contributions/14807/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14807/ END:VEVENT BEGIN:VEVENT SUMMARY:KM3NeT sensitivity to low energy astrophysical neutrinos DTSTART;VALUE=DATE-TIME:20210521T141000Z DTEND;VALUE=DATE-TIME:20210521T143000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14811@indico.ific.uv.es DESCRIPTION:Speakers: Gwenhaël de Wasseige (APC\, Université de Paris)\n KM3NeT\, a new generation of neutrino telescope\, is currently being deplo yed in the Mediterranean Sea. While its two sites\, ORCA and ARCA\, were r espectively designed for the determination of neutrino mass hierarchy and high-energy neutrino astronomy\, this contribution presents a study of the detection potential of KM3NeT in the MeV-GeV energy range. At these low e nergies\, the data rate is dominated by low-energy atmospheric muons and e nvironmental noise due to bioluminescence and K40 decay. The goal of this study is to characterize the environmental noise in order to optimize the selection of low-energy neutrino interactions and increase the sensitivity of KM3NeT to transient astrophysical phenomena\, such as close-by core-co llapse Supernovae\, solar flares\, and extragalactic transients. In this c ontribution\, we will study how using data science tools might improve the sensitivity of KM3NeT in these low-energy neutrino searches. We will firs t introduce the data sets and the different variables used to characterize KM3NeT sensor response to the environmental noise. We will then compare t he efficiency of various tools in identifying different components in the environmental noise and in disentangling low-energy neutrino interactions from the background sources. We will conclude with the implication for fut ure astrophysical transient neutrino searches.\n\nhttps://indico.ific.uv.e s/event/3965/contributions/14811/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14811/ END:VEVENT BEGIN:VEVENT SUMMARY:Multi-detector approach to enhance the sensitivity of neutrino tel escopes to low-energy astrophysical sources DTSTART;VALUE=DATE-TIME:20210521T135000Z DTEND;VALUE=DATE-TIME:20210521T141000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14753@indico.ific.uv.es DESCRIPTION:Speakers: Gwenhaël de Wasseige (APC\, Université de Paris)\n While large neutrino telescopes have so far mainly focused on the detectio n of TeV-PeV astrophysical neutrinos\, several efforts are ongoing to exte nd the sensitivity down to the GeV level for transient sources. Only a han dful of searches have been carried out at the moment leaving the signature of astrophysical transients poorly known in this energy range.\nIn this c ontribution\, we discuss the motivations for high-energy neutrino telescop es to explore the GeV energy range and summarize the current limitations o f detectors\, such as IceCube and KM3NeT. We then present and compare diff erent approaches for multi-detector analyses that may enhance the sensitiv ity to a transient GeV neutrino flux.\n\nhttps://indico.ific.uv.es/event/3 965/contributions/14753/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14753/ END:VEVENT BEGIN:VEVENT SUMMARY:KM3NeT Core Collapse Supernovae observation program in standalone and multi-messenger modes DTSTART;VALUE=DATE-TIME:20210521T133000Z DTEND;VALUE=DATE-TIME:20210521T135000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14752@indico.ific.uv.es DESCRIPTION:Speakers: Massimiliano Lincetto (Aix Marseille Univ\, CNRS/IN2 P3\, CPPM)\nThe KM3NeT research infrastructure in the Mediterranean is a m ulti-purpose cubic-kilometer neutrino observatory consisting of two detect ors optimized to study cosmic and atmospheric neutrinos between GeV to PeV energies. Additionally\, KM3NeT multi-photomultiplier optical modules all ow the detection of nearby MeV interaction products by selecting nanosecon d coincidences within the photomultipliers of the same module. Distributio n of the number of photomultipliers forming a coincidence (multiplicity) f or the whole supernova emission behaves as a proxy of the average neutrino energy. An optimised coincidence selection allows the KM3NeT detectors to be sensitive to Galactic supernovae and beyond. The large KM3NeT effectiv e volume allows a high number of detected events for a core collapse super novae explosion and the measurement of the neutrino light curve properties \, such as the light curve start time and the presence of the standing acc retion shock instability oscillations. Sub-millisecond time synchronizatio n between KM3NeT detectors allows common observation. Such a scheme can be also a viable solution to synchronize the KM3NeT telescopes with other de tectors aiming to observe neutrino emission from core collapse supernovae through the SNEWS network.\n\nhttps://indico.ific.uv.es/event/3965/contrib utions/14752/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14752/ END:VEVENT BEGIN:VEVENT SUMMARY:Multi-messenger offline follow-up studies with the ANTARES Neutrin o Telescope DTSTART;VALUE=DATE-TIME:20210519T162000Z DTEND;VALUE=DATE-TIME:20210519T164000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14887@indico.ific.uv.es DESCRIPTION:Speakers: Marta Colomer Molla (APC/IFIC)\nThe ANTARES neutrino telescope has been operating in the Mediterranean sea since 2008 in its f ull configuration\, with the main purpose of searching for high-energy cos mic neutrinos. During the last years\, multi-messenger astronomy has becom e one of the most exciting topics in astroparticles\, and a promising stra tegy to identify astrophysical sources of neutrinos. The ANTARES Collabora tion is actively participating to the follow-up of alerts sent by differen t experiments\, covering the full electromagnetic spectrum and gravitation al waves detected by interferometers.\n\nANTARES real-time response to the se alerts is complemented with dedicated offline analyses\, which are the focus of this talk. These studies allowed to set upper limits that constra in the neutrino emission from various astrophysical processes. The latest results\, including Fast Radio Bursts\, Gamma Ray Bursts and compact binar y mergers\, as well as neutrino alerts by others neutrino observatories (I ceCube\, GVD) will be discussed.\n\nhttps://indico.ific.uv.es/event/3965/c ontributions/14887/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14887/ END:VEVENT BEGIN:VEVENT SUMMARY:Real-time Multi-Messenger Analysis Framework of KM3NeT DTSTART;VALUE=DATE-TIME:20210519T160000Z DTEND;VALUE=DATE-TIME:20210519T162000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14889@indico.ific.uv.es DESCRIPTION:Speakers: Damien Dornic (Aix Marseille Univ\, CNRS/IN2P3\, CPP M\, Marseille\, France)\, Feifei Huang (Aix Marseille Univ\, CNRS / IN2P3\ , CPPM\, Marseille\, France)\nKM3NeT is a multi-purpose cubic-kilometer ne utrino observatory in construction in the Mediterranean Sea. It consists o f ORCA and ARCA (for Oscillation and Astroparticle Research with Cosmics i n the Abyss\, respectively)\, currently both with a few detection lines in operation. Although having different primary goals\, both detectors can b e used for neutrino astronomy over a wide energy range\, from a few tens o f MeVs to a few tens of PeV. In view of the growing field of time-domain a stronomy\, it is crucial to be able to identify neutrino candidates in rea l-time. This online neutrino sample will allow trigger neutrino alerts tha t will be sent to the astronomy community and to look for time/space coinc idence around external electromagnetic and multi-messenger triggers. These real-time searches can significantly increase the discovery potential of transient cosmic accelerators and refine the pointing directions in the ca se of poorly localized triggers\, such as gravitational waves. In the fiel d of core-collapse supernovae (CCSN)\, the detection of the MeV-scale CCSN neutrinos is crucial as an early warning of the electromagnetic follow-up . KM3NeT’s digital optical modules act as good detectors for these super novae neutrinos. This talk presents the status of KM3NeT's real-time multi -messenger activities\, including online event reconstruction\, event clas sification and selection\, alert distribution\, and supernova monitoring.\ n\nhttps://indico.ific.uv.es/event/3965/contributions/14889/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14889/ END:VEVENT BEGIN:VEVENT SUMMARY:Expected arrival-direction correlations between ultra-high-energy cosmic rays and high-energy neutrinos DTSTART;VALUE=DATE-TIME:20210519T154000Z DTEND;VALUE=DATE-TIME:20210519T160000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14890@indico.ific.uv.es DESCRIPTION:Speakers: Arjen van Vliet (DESY Zeuthen)\nThe discovery of a d iffuse flux of astrophysical neutrinos by IceCube has opened up new possib ilities for the search of cosmic-ray sources. The sources that accelerate cosmic rays to extreme energies are most-likely also high-energy neutrino emitters. To find such sources one can look for correlations in arrival di rections between astrophysical neutrinos and ultra-high-energy cosmic rays (UHECRs). However\, UHECRs are deflected by magnetic fields on their way from their sources to Earth\, and are subject to energy-loss processes (re sulting in a maximum distance from which they can arrive). We investigate how these effects influence the expected probability to find correlations between high-energy neutrinos and UHECRs\, taking into account the evoluti on with redshift of the sources and UHECR spectrum and composition measure ments [1]. The possibility to observe correlations between UHECRs and neut rinos is already strongly constrained by the absence of neutrino multiplet s in the IceCube measurements. However\, if connections between neutrinos and cosmic rays are measured\, it would give a precise indication for the local density of the emitters.\n\n---\n\n[1] A. Palladino\, A. van Vliet\, W. Winter and A. Franckowiak\, Mon. Not. Roy. Astron. Soc. 494 (2020) 3\, 4255\n\nhttps://indico.ific.uv.es/event/3965/contributions/14890/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14890/ END:VEVENT BEGIN:VEVENT SUMMARY:Constraining the contribution to Gamma-Ray Bursts to the high-ener gy diffuse neutrino flux with 10 years of ANTARES data DTSTART;VALUE=DATE-TIME:20210519T152000Z DTEND;VALUE=DATE-TIME:20210519T154000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14891@indico.ific.uv.es DESCRIPTION:Speakers: Angela Zegarelli (INFN\, Sapienza/Tor Vergata Univer sities\, Rome)\nGamma-Ray Bursts (GRBs) are considered very interesting as trophysical sources to be studied in the context of the neutrino astronomy . Indeed\, their jet composition continues to be an open issue. Within the framework of the fireball model\, mesons can be produced during photo-had ronic interactions occurring in the internal shocks between shells emitted by the central engine. From their decays\, high-energy gamma rays and neu trinos are expected to be generated. Neutrino telescopes are particularly interested in GRBs: being the most powerful explosions observable in the U niverse\, they are potentially able to achieve the energetics required to reproduce the diffuse astrophysical neutrino flux measured few years ago a nd\, thus\, they are expected to give a contribution to such astrophysical neutrino flux. The analysis here presented relies on the search of time a nd space coincidence between neutrinos and the GRB emission. The undersea neutrino telescope ANTARES\, operational in the Northern hemisphere since 2008 in its full configuration\, plays an important role in the cosmic neu trino searches. In this contribution\, the results of a stacked search for muon astrophysical neutrinos are presented for 784 GRBs in the period 200 7-2017 using the ANTARES data. Given the absence of coincidences between a neutrino and a GRB in the considered sample\, this analysis has allowed u s to constrain the contribution of the detected GRB population to the neut rino diffuse flux to be less than 10% around 100 TeV\, within the context of the internal shock model. In addition\, for the first time in this kind of analysis\, the uncertainties on the not well characterized GRB paramet ers\, needed to compute the neutrino flux expectations\, are taken into ac count for each individual burst and then propagated to the diffuse flux fr om GRBs and to the stacked limit.\n\nhttps://indico.ific.uv.es/event/3965/ contributions/14891/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14891/ END:VEVENT BEGIN:VEVENT SUMMARY:ANTARES search for neutrino flares DTSTART;VALUE=DATE-TIME:20210518T162000Z DTEND;VALUE=DATE-TIME:20210518T164000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14888@indico.ific.uv.es DESCRIPTION:Speakers: Giulia Illuminati ()\nIn 2017\, a high-energy muon n eutrino detected by IceCube was found positionally coincident with the dir ection of a known blazar\, TXS 0506+056\, in a state of enhanced $\\gamma$ -ray emission. Soon after\, IceCube reported a compelling evidence for an earlier neutrino flare from the same direction found in the archival data\ , this time not accompanied by any observed electromagnetic activity. The IceCube findings suggest searching for flaring neutrino emissions from ast rophysical sources\, not necessarily accompanied by flares detected in $\\ gamma$-rays. The analysis presented in this contribution scans the events collected by the ANTARES neutrino telescope in 13 years of data taking in a search for clustering in space and time. The analysis method is based on an unbinned maximum likelihood approach. A generic Gaussian profile is as sumed for the signal time emission\, with both the Gaussian mean (time of the peak of the flare) and sigma (duration of the flare) being free parame ters in the likelihood maximization. We plan to apply the time-dependent a pproach to the catalog of radio-bright blazars for which a promising direc tional correlation with IceCube muon tracks was recently reported [ApJ 894 (2020)101\, ApJ 908(2021)157].\n\nhttps://indico.ific.uv.es/event/3965/con tributions/14888/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14888/ END:VEVENT BEGIN:VEVENT SUMMARY:Multi-messenger studies with the Baikal-GVD telescope DTSTART;VALUE=DATE-TIME:20210518T160000Z DTEND;VALUE=DATE-TIME:20210518T162000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14886@indico.ific.uv.es DESCRIPTION:Speakers: Olga Suvorova (Institute for Nuclear Research of the Russian Academy of Sciences)\nThe current activity of the Baikal-GVD neut rino experiment in the multi-messenger program on discovering the astrophy sical sources of high energy fluxes of cosmic particles will be presented\ , with emphasis on results of the follow up of high energy neutrino alerts .\n\nhttps://indico.ific.uv.es/event/3965/contributions/14886/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14886/ END:VEVENT BEGIN:VEVENT SUMMARY:Multi-messenger searches via IceCube’s high-energy neutrinos and gravitational-wave detections of LIGO/Virgo DTSTART;VALUE=DATE-TIME:20210518T152000Z DTEND;VALUE=DATE-TIME:20210518T154000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14884@indico.ific.uv.es DESCRIPTION:Speakers: Doga Veske (Columbia University)\nMulti-messenger de tections of astrophysical events improve our understanding of the underlyi ng sources. In addition to probing different physics\, such detections can provide improved localization in low latency\, guiding astronomers who pe rform follow-up observations. We will present the real-time and offline se arches for high-energy neutrinos associated with gravitational-wave events via IceCube’s neutrinos and LIGO/Virgo’s public announcements and det ections.\n\nhttps://indico.ific.uv.es/event/3965/contributions/14884/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14884/ END:VEVENT BEGIN:VEVENT SUMMARY:Search for periodic neutrino emission from X-ray Binaries DTSTART;VALUE=DATE-TIME:20210518T150000Z DTEND;VALUE=DATE-TIME:20210518T152000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14892@indico.ific.uv.es DESCRIPTION:Speakers: Chun Fai Tung (Georgia Institute of Technology)\nX-r ay binaries (XRBs) are binary system with an accreting compact object. The y have long been suggested to be possible galactic cosmic ray accelerators . In such models\, the protons accelerated by the accretion process at the compact object could carry out $pp$ or $p\\gamma$ interactions in the acc retion disk\, in the atmosphere of the companion star\, or in the stellar wind. High energy neutrinos may be produced from these interactions and wi ll serve as a smoking-gun evidence for CR acceleration. Furthermore\, many models predicted their neutrino emission to be modulated by the orbital p eriods. In this talk\, I will present the result of the latest search for periodic neutrino emission from X-ray binaries performed by IceCube Neutri no Observatory. Using 7.5 years of IceCube's muon track data\, this search featured an improved unbinned maximum likelihood ratio method\, and was p erformed on a catalogue of 55 XRBs with declination $\\geq -5^o$\, greatly expanded over the previous periodic point-source searches. This study fou nd no evidence for neutrino emission\, but have placed upper limits on the neutrino flux from each XRB. Comparisons between the results and some phe nomenological models\, and predictions for observations by IceCube Gen2 wi ll also be presented.\n\nhttps://indico.ific.uv.es/event/3965/contribution s/14892/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14892/ END:VEVENT BEGIN:VEVENT SUMMARY:Follow up of the IceCube alerts with the Baikal-GVD telescope DTSTART;VALUE=DATE-TIME:20210518T154000Z DTEND;VALUE=DATE-TIME:20210518T160000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14885@indico.ific.uv.es DESCRIPTION:Speakers: Viktoriya Dik (Joint Institute for Nuclear Research) \nThe high-energy neutrino events of the IceCube telescope\, which trigger \nneutrino alerts in one of two probability ranks of astrophysical origin\ ,\n“gold " and "bronze"\, have been followed up with Baikal-GVD in a fas t\nquasi-online mode since September 2020. Search for correlations between \nalerts and events reconstructed in two modes\, track and cascade\, for t he\ntime windows \\pm 1 hour and \\pm 12 hours does not indicate statistic ally\nsignificant excess of the measured events over the expected number o f\nbackground events. Upper limits on the neutrino fluence will be present ed\nfor each alert.\n\nhttps://indico.ific.uv.es/event/3965/contributions/ 14885/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14885/ END:VEVENT BEGIN:VEVENT SUMMARY:Passive Acoustic Monitoring of Cetaceans with KM3NeT acoustic rece ivers DTSTART;VALUE=DATE-TIME:20210521T135000Z DTEND;VALUE=DATE-TIME:20210521T141000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14759@indico.ific.uv.es DESCRIPTION:Speakers: Carlo Guidi (INFN - Genova)\nThe KM3NeT infrastructu re comprises a network of underwater neutrino telescopes in the Mediterran ean Sea. Secondary particles\, produced when neutrinos interact\, emit Che renkov photons which are measured by the KM3NeT detectors.\nIn order to pr ecisely reconstruct muon tracks and showers\, it is necessary to know the position of the photomultipliers with an accuracy of about 10 cm.\nFor thi s purpose\, an acoustic system consisting of hydrophones and piezoelectric sensors is set up and three acoustic emitters are placed around the detec tor.\nUsing underwater acoustic sensors as a passive acoustic monitoring s ystem opens the possibility to study several aspects related to underwater noise present in the marine environment. Of special relevance are the bio -acoustic signals produced by marine mammals present in the Mediterranean Sea. The Gulf of Lion area has particular importance due to the presence o f many cetacean’s species such as sperm whales and various types of dolp hins. Depending on the detected bio acoustic signals (echolocation clicks or whistles) it is possible to infer\, from absence/presence of marine mam mals\, the circadian and seasonal patterns of activity. Moreover\, conside ring the click intervals\, the identification of different cetacean specie s is possible. \nThe purpose of this talk is to illustrate the potential o f the KM3NeT acoustic system to perform long term monitoring regarding bio -acoustic signal detection.\nSimulations and applications to real data of marine mammal click detection and consequent reconstruction of the positio n of the acoustic sources have been performed\, together with studies on d olphin whistle activity and the statistics related with the frequency band estimation\, revealing that KM3NeT infrastructure is a relevant system fo r underwater passive acoustic monitoring.\n\nhttps://indico.ific.uv.es/eve nt/3965/contributions/14759/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14759/ END:VEVENT BEGIN:VEVENT SUMMARY:Perspectives for probing the Earth core composition with atmospher ic neutrino detectors DTSTART;VALUE=DATE-TIME:20210521T141000Z DTEND;VALUE=DATE-TIME:20210521T143000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14898@indico.ific.uv.es DESCRIPTION:Speakers: Lukas Maderer (APC\, Université de Paris)\nOur know ledge about the Earth's interior is mainly based on seismic measurements\, cosmochemical and petrological constraints\, and theories of Earth format ion. Whereas the matter density profile is determined with a high precisio n\, the chemical composition of the deep Earth can only be estimated indir ectly. In particular the amount and nature of light elements in the Core r emain controversial. \n\nA new approach comes from the field of particle p hysics. The oscillation probabilities of neutrinos traversing the Earth ar e affected by the electron density along their trajectory. In combination with a known matter density profile\, their measurement leads to a direct constrain of the proton-to-nucleon (Z/A) ratio along the neutrino path. Si nce this parameter varies among chemical elements this technique has the p otential to provide insights into the chemical composition of the core. Fr om the current knowledge of the Earth’s interior\, oscillation resonance effects are expected at ~GeV energies\, making atmospheric neutrinos exce llent candidates for oscillation tomography research\n\nIn our study we fi nd that the atmospheric neutrino telescope KM3NeT/ORCA will be able to res olve the Z/A ratio of the Earth’s outer core with an uncertainty of \n\n https://indico.ific.uv.es/event/3965/contributions/14898/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14898/ END:VEVENT BEGIN:VEVENT SUMMARY:Luminescence of Baikal Water as a Dynamic Background of the Baikal -GVD Neutrino Telescope DTSTART;VALUE=DATE-TIME:20210521T133000Z DTEND;VALUE=DATE-TIME:20210521T135000Z DTSTAMP;VALUE=DATE-TIME:20260618T172250Z UID:indico-contribution-3965-14897@indico.ific.uv.es DESCRIPTION:Speakers: Eliška Eckerová (Comenius University in Bratislava )\nBaikal-GVD is a neutrino telescope situated in the deepest freshwater l ake in the world – Lake Baikal. It is a three-dimensional array of photo -multiplier tubes\, that are arranged in independently working units calle d clusters. The main purpose of this telescope is to detect neutrinos via detecting the Cherenkov radiation of the secondary charged particles that are created in the interactions of neutrinos.\n\nThe design of the Baikal- GVD trigger system allows also to study the ambient light. The analysis of the optical noise\, particularly\, time and spatial variations of the noi se frequency collected by various clusters will be presented.\n\nhttps://i ndico.ific.uv.es/event/3965/contributions/14897/ LOCATION:Valencia URL:https://indico.ific.uv.es/event/3965/contributions/14897/ END:VEVENT END:VCALENDAR