TY - JOUR
T1 - A Joint Fermi-GBM and LIGO/Virgo Analysis of Compact Binary Mergers from the First and Second Gravitational-wave Observing Runs
AU - Hamburg, R.
AU - Fletcher, C.
AU - Burns, E.
AU - Goldstein, A.
AU - Bissaldi, E.
AU - Briggs, M.S.
AU - Cleveland, W.H.
AU - Giles, M.M.
AU - Hui, C.M.
AU - Kocevski, D.
AU - Lesage, S.
AU - Mailyan, B.
AU - Malacaria, C.
AU - Poolakkil, S.
AU - Preece, R.
AU - Roberts, O.J.
AU - Veres, P.
AU - von Kienlin, A.
AU - Wilson-Hodge, C.A.
AU - Wood, J.
AU - Abbott, R.
AU - Abbott, T.D.
AU - Abraham, S.
AU - Acernese, F.
AU - Ackley, K.
AU - Adams, C.
AU - Adhikari, R.X.
AU - Adya, V.B.
AU - Affeldt, C.
AU - Agathos, M.
AU - Agatsuma, K.
AU - Aggarwal, N.
AU - Aguiar, O.D.
AU - Aich, A.
AU - Aiello, L.
AU - Ain, A.
AU - Ajith, P.
AU - Allen, G.
AU - Allocca, A.
AU - Altin, P.A.
AU - Amato, A.
AU - Anand, S.
AU - Ananyeva, A.
AU - Anderson, S.B.
AU - Anderson, W.G.
AU - Angelova, S.V.
AU - Ansoldi, S.
AU - Antier, S.
AU - Appert, S.
AU - Arai, K.
AU - Hild, Stefan
AU - Koekoek, Gideon
AU - van den Brand, Johannes
AU - Virgo Collaboration
AU - LIGO Scientific Collaboration
AU - Fermi GBM Collaboration
PY - 2020/4/1
Y1 - 2020/4/1
N2 - 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 similar to 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.x.10(-6) Hz, we do not consider it an astrophysical association. We find no additional coincidences.
AB - 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 similar to 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.x.10(-6) Hz, we do not consider it an astrophysical association. We find no additional coincidences.
U2 - 10.3847/1538-4357/ab7d3e
DO - 10.3847/1538-4357/ab7d3e
M3 - Article
SN - 0004-637X
VL - 893
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 100
ER -