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LIGO, California Institute of Technology, Pasadena, California 91125, USA.
Louisiana State University, Baton Rouge, Louisiana 70803, USA.
Phys Rev Lett. 2017 Oct 6;119(14):141101. doi: 10.1103/PhysRevLett.119.141101.
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 30.5_{-3.0}^{+5.7}M_{⊙} and 25.3_{-4.2}^{+2.8}M_{⊙} (at the 90% credible level). The luminosity distance of the source is 540_{-210}^{+130} Mpc, corresponding to a redshift of z=0.11_{-0.04}^{+0.03}. A network of three detectors improves the sky localization of the source, reducing the area of the 90% credible region from 1160 deg^{2} using only the two LIGO detectors to 60 deg^{2} 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.
2017年8月14日协调世界时10∶30:43，先进处女座探测器和两台先进激光干涉引力波天文台探测器协同观测到由两个恒星质量黑洞合并产生的瞬态引力波信号，误报率约为每27000年低于1次。该信号由三探测器网络观测到，匹配滤波信噪比为18。推断初始黑洞的质量为30.5_{-3.0}^{+5.7}太阳质量和25.3_{-4.2}^{+2.8}太阳质量（90%置信水平）。源的光度距离为540_{-210}^{+130} 兆秒差距，对应红移z = 0.11_{-0.04}^{+0.03}。三探测器网络改善了源的天空定位，将90%置信区域的面积从仅使用两台激光干涉引力波天文台探测器时的1160平方度减小到使用所有三台探测器时的60平方度。我们首次能够根据激光干涉引力波天文台 - 处女座网络的天线响应来检验引力波偏振的性质，从而实现一类新的引力现象学检验。
