IceCube Search for Neutrinos Coincident with Compact Binary Mergers from LIGO-Virgo’s First Gravitational-Wave Transient Catalog. (arXiv:2004.02910v1 [astro-ph.HE])

IceCube Search for Neutrinos Coincident with Compact Binary Mergers from LIGO-Virgo’s First Gravitational-Wave Transient Catalog. (arXiv:2004.02910v1 [astro-ph.HE])
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Using the IceCube Neutrino Observatory, we search for high-energy neutrino
emission coincident with compact binary mergers observed by the LIGO and Virgo
gravitational wave (GW) detectors during their first and second observing runs.
We present results from two searches targeting emission coincident with the sky
localization of each gravitational wave event within a 1000 second time window
centered around the reported merger time. One search uses a model-independent
unbinned maximum likelihood analysis, which uses neutrino data from IceCube to
search for point-like neutrino sources consistent with the sky localization of
GW events. The other uses the Low-Latency Algorithm for Multi-messenger
Astrophysics, which incorporates astrophysical priors through a Bayesian
framework and includes LIGO-Virgo detector characteristics to determine the
association between the GW source and the neutrinos. No significant neutrino
coincidence is seen by either search during the first two observing runs of the
LIGO-Virgo detectors. We set upper limits on the time-integrated neutrino
emission within the 1000 second window for each of the 11 GW events. These
limits range from 0.02-0.7 $mathrm{GeV~cm^{-2}}$. We also set limits on the
total isotropic equivalent energy, $E_{mathrm{iso}}$, emitted in high-energy
neutrinos by each GW event. These limits range from 1.7 $times$ 10$^{51}$ –
1.8 $times$ 10$^{55}$ erg. We conclude with an outlook for LIGO-Virgo
observing run O3, during which both analyses are running in real time.

Using the IceCube Neutrino Observatory, we search for high-energy neutrino
emission coincident with compact binary mergers observed by the LIGO and Virgo
gravitational wave (GW) detectors during their first and second observing runs.
We present results from two searches targeting emission coincident with the sky
localization of each gravitational wave event within a 1000 second time window
centered around the reported merger time. One search uses a model-independent
unbinned maximum likelihood analysis, which uses neutrino data from IceCube to
search for point-like neutrino sources consistent with the sky localization of
GW events. The other uses the Low-Latency Algorithm for Multi-messenger
Astrophysics, which incorporates astrophysical priors through a Bayesian
framework and includes LIGO-Virgo detector characteristics to determine the
association between the GW source and the neutrinos. No significant neutrino
coincidence is seen by either search during the first two observing runs of the
LIGO-Virgo detectors. We set upper limits on the time-integrated neutrino
emission within the 1000 second window for each of the 11 GW events. These
limits range from 0.02-0.7 $mathrm{GeV~cm^{-2}}$. We also set limits on the
total isotropic equivalent energy, $E_{mathrm{iso}}$, emitted in high-energy
neutrinos by each GW event. These limits range from 1.7 $times$ 10$^{51}$ –
1.8 $times$ 10$^{55}$ erg. We conclude with an outlook for LIGO-Virgo
observing run O3, during which both analyses are running in real time.

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