Speaker
Description
Astrophysical neutrinos are expected to be produced during transient phenomena that also produce gravitational waves, such as compact binary coalescences, in particular those involving neutron stars, or core-collapse supernovae. Gravitational waves are routinely detected by the LIGO-Virgo-KAGRA interferometers, while the ANTARES and KM3NeT deep-sea neutrino telescopes are sensitive to neutrino interactions in a wide range of energies, from MeV to PeV. The contribution overviews sub-threshold searches for neutrino triggers observed in temporal and spatial correlation with gravitational wave triggers. This analysis employs a Bayesian metric to rank associations between high-energy neutrino and gravitational wave triggers. Backgrounds are modelled from data by shifting the timings of the neutrino and gravitational wave triggers, and are used to assign a false-alarm rate to the neutrino-gravitational wave associations. Here, these associations are investigated using public LIGO-Virgo-KAGRA data from the O3 run together with data collected by the ANTARES and KM3NeT-ORCA detectors during the corresponding period.
