Physical Review D
On September 14, 2015, at 09:50:45 UTC the two detectors of the Laser Interferometer Gravitational-Wave Observatory (LIGO) simultaneously observed the binary black hole merger GW150914. We report the results of a matched-filter search using relativistic models of compact-object binaries that recovered GW150914 as the most significant event during the coincident observations between the two LIGO detectors from September 12 to October 20, 2015 GW150914 was observed with a matched-filter signal-to-noise ratio of 24 and a false alarm rate estimated to be less than 1 event per 203000 years, equivalent to a significance greater than 5.1 sigma.
Abbott, B. P., Jawahar, S., Lockerbie, N. A., & Tokmakov, K. V. (2016). LIGO Scientific Collaboration and Virgo Collaboration (2016) GW150914: first results from the search for binary black hole coalescence with Advanced LIGO. Physical Review D, 93 (12). ISSN 1550-2368. PHYSICAL REVIEW D Phys Rev D, 93, 122003.