GW170608: observation of a 19 solar-mass binary black hole coalescence

B. P. Abbott, R. Birney, S. Jawahar, N. A. Lockerbie, S. Reid, K. V. Tokmakov, LIGO Scientific Collaboration, 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 black holes was observed by the two Advanced Laser Interferometer Gravitational-Wave Observatory detectors with a network signal-to-noise ratio of 13. This system is the lightest black hole binary so far observed, with component masses of 12+7-2Mand 7+2-2M• (90% credible intervals). These lie in the range of measured black hole masses in low-mass X-ray binaries, thus allowing us to compare black holes detected through GWs with electromagnetic observations. The source's luminosity distance is 340+140-140Mpc, corresponding to redshift 0.07+0.03-0.03. We verify that the signal waveform is consistent with the predictions of general relativity.
Original languageEnglish
Pages (from-to)1-11
Number of pages11
JournalAstrophysical Journal Letters
Issue number2
Publication statusPublished - 18 Dec 2017


  • gravitational waves
  • binaries
  • stars
  • black holes
  • GW170608


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