Speaker
Description
Gravitational-wave events from mergers of compact objects, both binary black holes and mergers including at least one neutron star, are a predicted source of high-energy neutrinos. In addition to their electromagnetic counterparts, particles accelerated during the compact object coalescence may also interact to produce high-energy neutrinos. The LIGO-Virgo-KAGRA Collaboration sends candidate gravitational wave events from compact binary coalescences publicly in real time during the current observing run (O4). Using data from the IceCube Neutrino Observatory, we search for neutrinos spatially and temporally coincident with these gravitational wave candidate events using a time window of 1000 seconds centered on the merger time. We use two methods, both of which have been previously used to search for neutrino emission from gravitational-wave transients: an unbinned maximum likelihood analysis applied to significant alerts and a Bayesian analysis with astrophysical priors, applied to both significant and low-significance alerts. In addition, we search for long-duration neutrino emission up to 14 days after the merging of binaries containing a neutron star. We report analysis results determined in real time for these searches, and set upper limits on both flux and isotropic-equivalent energy emitted in neutrinos.
| Collaboration(s) | IceCube Collaboration |
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