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A joint fermi-gbm and ligo/virgo analysis of compact binary mergers from the first and second gravitational-wave observing runs

Hamburg R.
•
Fletcher C.
•
Burns E.
altro
Zweizig J.
2020
  • journal article

Periodico
THE ASTROPHYSICAL JOURNAL
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.
DOI
10.3847/1538-4357/ab7d3e
WOS
WOS:000547576300001
Archivio
http://hdl.handle.net/20.500.11767/115374
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85085073754
https://ui.adsabs.harvard.edu/abs/2020ApJ...893..100H/abstract
Diritti
metadata only access
Soggetti
  • Settore FIS/05 - Astr...

Scopus© citazioni
8
Data di acquisizione
Jun 15, 2022
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Web of Science© citazioni
10
Data di acquisizione
Mar 26, 2024
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Data di acquisizione
Apr 19, 2024
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