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dx3bydt3 [soylentnews.org] writes:

For the first time three gravitational wave detectors have recorded the same event. [caltech.edu] The detection was made by both LIGO [caltech.edu]( and Advanced Virgo [virgo-gw.eu] Which has just recently begun collecting data for the first time.
From the news release:
"The LIGO Scientific Collaboration and the Virgo collaboration report the first joint detection of gravitational waves with both the LIGO and Virgo detectors. This is the fourth announced detection of a binary black hole system and the first significant gravitational-wave signal recorded by the Virgo detector, and highlights the scientific potential of a three-detector network of gravitational-wave detectors.

The three-detector observation was made on August 14, 2017 at 10:30:43 UTC. The two Laser Interferometer Gravitational-Wave Observatory (LIGO) detectors, located in Livingston, Louisiana, and Hanford, Washington, and funded by the National Science Foundation (NSF), and the Virgo detector, located near Pisa, Italy, detected a transient gravitational-wave signal produced by the coalescence of two stellar mass black holes.

A paper about the event, known as GW170814 [ligo.org], has been accepted for publication in the journal Physical Review Letters."

Original Submission