A joint fermi-gbm and ligo/virgo analysis of compact binary mergers from the first and second gravitational-wave observing runs
Source
Astrophysical Journal
ISSN
0004637X
Date Issued
2020-04-20
Author(s)
Hamburg, R.
Fletcher, C.
Burns, E.
Goldstein, A.
Bissaldi, E.
Briggs, M. S.
Cleveland, W. H.
Giles, M. M.
Hui, C. M.
Kocevski, D.
Lesage, S.
Mailyan, B.
Malacaria, C.
Poolakkil, S.
Preece, R.
Roberts, O. J.
Veres, P.
Von Kienlin, A.
Wilson-Hodge, C. A.
Wood, J.
Abbott, R.
Abbott, T. D.
Abraham, S.
Acernese, F.
Ackley, K.
Adams, C.
Adhikari, R. X.
Adya, V. B.
Affeldt, C.
Agathos, M.
Agatsuma, K.
Aggarwal, N.
Aguiar, O. D.
Aich, A.
Aiello, L.
Ain, A.
Ajith, P.
Allen, G.
Allocca, A.
Altin, P. A.
Amato, A.
Anand, S.
Ananyeva, A.
Anderson, S. B.
Anderson, W. G.
Angelova, S. V.
Ansoldi, S.
Antier, S.
Appert, S.
Arai, K.
Araya, M. C.
Areeda, J. S.
Arene, M.
Arnaud, N.
Aronson, S. M.
Ascenzi, S.
Ashton, G.
Aston, S. M.
Astone, P.
Aubin, F.
Aufmuth, P.
Aultoneal, K.
Austin, C.
Avendano, V.
Babak, S.
Bacon, P.
Badaracco, F.
Bader, M. K.M.
Bae, S.
Baer, A. M.
Baird, J.
Baldaccini, F.
Ballardin, G.
Ballmer, S. W.
Bals, A.
Balsamo, A.
Baltus, G.
Banagiri, S.
Bankar, D.
Bankar, R. S.
Barayoga, J. C.
Barbieri, C.
Barish, B. C.
Barker, D.
Barkett, K.
Barneo, P.
Barone, F.
Barr, B.
Barsotti, L.
Barsuglia, M.
Barta, D.
Bartlett, J.
Bartos, I.
Bassiri, R.
Basti, A.
Bawaj, M.
Bayley, J. C.
Bazzan, M.
Bécsy, B.
Bejger, M.
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<sup>-6</sup> Hz, we do not consider it an astrophysical association. We find no additional coincidences.