Search for gravitational waves associated with gamma-ray bursts detected by Fermi and Swift during the LIGO-Virgo Run O3a

The LIGO Scientific Collaboration, Virgo Collaboration, G. S. Davies, O. Edy, I. W. Harry, D. Keitel, A. P. Lundgren, R. Macas, C. McIsaac, S. Mozzon, L. K. Nuttall, A. R. Williamson

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Abstract

We search for gravitational-wave transients associated with gamma-ray bursts detected by the Fermi and Swift satellites during the first part of the third observing run of Advanced LIGO and Advanced Virgo (1 April 2019 15:00 UTC - 1 October 2019 15:00 UTC). 105 gamma-ray bursts were analyzed using a search for generic gravitational-wave transients; 32 gamma-ray bursts were analyzed with a search that specifically targets neutron star binary mergers as short gamma-ray burst progenitors. We describe a method to calculate the probability that triggers from the binary merger targeted search are astrophysical and apply that method to the most significant gamma-ray bursts in that search. We find no significant evidence for gravitational-wave signals associated with the gamma-ray bursts that we followed up, nor for a population of unidentified subthreshold signals. We consider several source types and signal morphologies, and report for these lower bounds on the distance to each gamma-ray burst.
Original languageEnglish
Article number86
Number of pages16
JournalThe Astrophysical Journal
Volume915
Issue number86
DOIs
Publication statusPublished - 9 Jul 2021

Keywords

  • gravitational waves
  • gravitational wave astronomy
  • LIGO
  • gamma-ray burts
  • compact binary stars
  • neutron stars
  • black holes
  • RCUK
  • STFC
  • GW_HIGHLIGHT

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