A Fermi Gamma-Ray Burst Monitor Search for Electromagnetic Signals Coincident with Gravitational-wave Candidates in Advanced LIGO's First Observing Run
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AbstractWe present a search for prompt gamma-ray counterparts to compact binary coalescence gravitational wave (GW) candidates from Advanced LIGO's first observing run (O1). As demonstrated by the multimessenger observations of GW170817/GRB 170817A, electromagnetic and GW observations provide complementary information about the astrophysical source, and in the case of weaker candidates, may strengthen the case for an astrophysical origin. Here we investigate low-significance GW candidates from the O1 compact binary coalescence searches using the Fermi Gamma-Ray Burst Monitor (GBM), leveraging its all sky and broad energy coverage. Candidates are ranked and compared to background to measure the significance. Those with false alarm rates (FARs) of less than 10−5 Hz (about one per day, yielding a total of 81 candidates) are used as the search sample for gamma-ray follow-up. No GW candidates were found to be coincident with gamma-ray transients independently identified by blind searches of the GBM data. In addition, GW candidate event times were followed up by a separate targeted search of GBM data. Among the resulting GBM events, the two with the lowest FARs were the gamma-ray transient GW150914-GBM presented in Connaughton et al. and a solar flare in chance coincidence with a GW candidate.
All Author(s) ListThe LIGO Scientific Collaboration and the Virgo Collaboration
Journal nameAstrophysical Journal
Year2019
Month1
Day20
Volume Number871
Issue Number1
PublisherIOP PUBLISHING LTD
Article number90
ISSN0004-637X
eISSN1538-4357
LanguagesEnglish-United Kingdom
Keywordsgamma-ray burst: general, gravitational waves
Web of Science Subject CategoriesAstronomy & Astrophysics;Astronomy & Astrophysics

Last updated on 2020-31-03 at 02:22