ausblenden:
Schlagwörter:
Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
Zusammenfassung:
We 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 significance. Those with false alarm rates of less than
10^-5 Hz (about one per day) 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 lowest false
alarm rates were the gamma-ray transient GW150914-GBM presented in Connaughton
et al. (2016) and a solar flare in chance coincidence with a GW candidate.