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|Title:||A joint fermi-gbm and ligo/virgo analysis of compact binary mergers from the first and second gravitational-wave observing runs|
|Author:||Gamma-Ray Burst Monitor, F.|
Ligo Scientific Collaboration, T.
Von Kienlin, A.
|Citation:||The Astrophysical Journal: an international review of astronomy and astronomical physics, 2020; 893(2):1-14|
|R. Abbott ... Peter Veitch ... Jesper Munch ... David Ottaway ... Craig Ingram ... Sebastian Ng ... et al.|
|Abstract:||We present results from offline searches of Fermi Gamma-ray Burst Monitor (GBM) data for gamma-ray transients coincident with the compact binary coalescences observed by the gravitational-wave (GW) detectors Advanced LIGO and Advanced Virgo during their first and second observing runs. In particular, we perform follow-up for both confirmed events and low significance candidates reported in the LIGO/Virgo catalog GWTC-1. We search for temporal coincidences between these GW signals and GBM-triggered gamma-ray bursts (GRBs). We also use the GBM Untargeted and Targeted subthreshold searches to find coincident gamma-rays below the onboard triggering threshold. This work implements a refined statistical approach by incorporating GW astrophysical source probabilities and GBM visibilities of LIGO/Virgo sky localizations to search for cumulative signatures of coincident subthreshold gamma-rays. All search methods recover the short gamma-ray burst GRB 170817A occurring ~1.7 s after the binary neutron-star merger GW170817. We also present results from a new search seeking GBM counterparts to LIGO single-interferometer triggers. This search finds a candidate joint event, but given the nature of the GBM signal and localization, as well as the high joint false alarm rate of 1.1 × 10−6 Hz, we do not consider it an astrophysical association. We find no additional coincidences.|
|Rights:||© 2020. The American Astronomical Society. All rights reserved.|
|Appears in Collections:||Aurora harvest 4|
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