GW170814: A three-detector observation of gravitational waves from a binary black hole coalescence

LIGO Scientific Collaboration and Virgo Collaboration

Research output: Contribution to journalArticlepeer-review

Abstract

On August 14, 2017 at 10∶30:43 UTC, the Advanced Virgo detector and the two Advanced LIGO detectors coherently observed a transient gravitational-wave signal produced by the coalescence of two stellar mass black holes, with a false-alarm rate of ≲1 in 27 000 years. The signal was observed with a three-detector network matched-filter signal-to-noise ratio of 18. The inferred masses of the initial black holes are 30.5þ−35..07M☉ and 25:3þ42..28M☉ (at the 90% credible level). The luminosity distance of the source is 540þ−210130 Mpc, corresponding to a redshift of z ¼ 0.11þ00..0403. A network of three detectors improves the sky localization of the source, reducing the area of the 90% credible region from 1160 deg2 using only the two LIGO detectors to 60 deg2 using all three detectors. For the first time, we can test the nature of gravitational-wave polarizations from the antenna response of the LIGO-Virgo network, thus enabling a new class of phenomenological tests of gravity.

Original languageEnglish (US)
JournalUnknown Journal
StatePublished - Sep 27 2017

ASJC Scopus subject areas

  • General

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