Binary Black Hole Mergers in the First Advanced LIGO Observing Run
Abstract
The first observational run of the Advanced LIGO detectors, from September 12, 2015 to January 19, 2016, saw the first detections of gravitational waves from binary black hole mergers. In this paper, we present full results from a search for binary black hole merger signals with total masses up to 100 M_{☉} and detailed implications from our observations of these systems. Our search, based on generalrelativistic models of gravitationalwave signals from binary black hole systems, unambiguously identified two signals, GW150914 and GW151226, with a significance of greater than 5 σ over the observing period. It also identified a third possible signal, LVT151012, with substantially lower significance and with an 87% probability of being of astrophysical origin. We provide detailed estimates of the parameters of the observed systems. Both GW150914 and GW151226 provide an unprecedented opportunity to study the twobody motion of a compactobject binary in the large velocity, highly nonlinear regime. We do not observe any deviations from general relativity, and we place improved empirical bounds on several highorder postNewtonian coefficients. From our observations, we infer stellarmass binary black hole merger rates lying in the range 9  240 Gpc^{3} yr^{1} . These observations are beginning to inform astrophysical predictions of binary black hole formation rates and indicate that future observing runs of the Advanced detector network will yield many more gravitationalwave detections.
 Publication:

Physical Review X
 Pub Date:
 October 2016
 DOI:
 10.1103/PhysRevX.6.041015
 arXiv:
 arXiv:1606.04856
 Bibcode:
 2016PhRvX...6d1015A
 Keywords:

 General Relativity and Quantum Cosmology;
 Astrophysics  Cosmology and Nongalactic Astrophysics
 EPrint:
 36 pages + 4 appendices, 14 figures