Ponente
Descripción
The moment a neutrino event, likely of astrophysical origin, triggers a light emission in the glacial ice at the South Pole, the IceCube Neutrino Observatory issues a real-time alert to potential observers worldwide. The same filters that select alerts with track-like signatures were applied to the entire IceCube data sample from 2011 to 2023, leading to the public release of the IceCat-1 catalog. Several searches for potential astrophysical neutrino sources have been based on these alerts, with some even reporting evidence of neutrino emission. In 2024, the directional reconstruction used for real-time track alerts was updated, reducing the area of the 50%(90%) error regions by factors of 5(4), while also improving statistical coverage. This update, together with the addition of the latest alerts, motivated the creation of the IceCat-2 catalog. Here, we present preliminary results and correlation studies based on IceCat-2, which may shed new light on the puzzle of the origin of astrophysical neutrinos.
