Sub-threshold search for strongly lensed gravitational-wave events in the first half of LIGO-Virgo's third observing run

31 Aug 2021, 17:10
Talk in parallel session Gravitational Waves Discussion Panel Gravitational Waves 1


Chan Chun Lung (The Chinese University of Hong Kong)


Strong gravitational lensing of gravitational waves can produce duplicate signals separated in time with different amplitudes. We consider the case in which strong lensing produces identifiable gravitational wave events and weaker sub-threshold signals hidden in the noise background. We present a search method for the sub-threshold signals using targeted template banks targeting specific confirmed gravitational wave events. We apply the method to all the gravitational-wave signals from compact binary coalescences detected by Advanced LIGO and Advanced Virgo during O3a, the first half of their third observing run. Finally, we present the top 8 possible lensed candidates for O3a gravitational wave events that passed our nominal significance threshold of False Alarm Rate 1 in 16 years. Furthermore, we discuss the likelihood that these candidates are strongly lensed.

Reference to paper (DOI or arXiv) arXiv:2105.06384

Primary authors

Chan Chun Lung (The Chinese University of Hong Kong) Mr. Li Alvin Ka Yue (California Institute of Technology) Mr. Yeung Man Chun (The Chinese Universoty of Hong Kong)

Presentation Materials

Your browser is out of date!

Update your browser to view this website correctly. Update my browser now