GW170608: Observation of a 19 Solar-mass Binary Black Hole Coalescence

LIGO Scientific Collaboration and Virgo Collaboration

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On 2017 June 8 at 02:01:16.49 UTC, a gravitational-wave (GW) signal from the merger of two stellar-mass blackholes was observed by the two Advanced Laser Interferometer Gravitational-Wave Observatory detectors with anetwork signal-to-noise ratio of 13. This system is the lightest black hole binary so far observed, with componentmasses of 12+7 -2M⊙7+2 -2 (90% credible intervals). These lie in the range of measured black hole masses inlow-mass X-ray binaries, thus allowing us to compare black holes detected through GWs with electromagneticobservations. The source's luminosity distance is 340+140 -140corresponding to redshift -0.07+0.030 03. We verify thatthe signal waveform is consistent with the predictions of general relativity.
Original languageEnglish
Article numberL35
Pages (from-to)1-11
Number of pages11
JournalAstrophysical Journal Letters
Issue number2
Publication statusPublished - 20 Dec 2017

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