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Old 17-11-2017, 08:38 AM
gary
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Post LIGO announces detection of another black hole merger - GW170608

In a 15 November press release, LIGO investigators announced the
discovery of yet another gravitational wave detection event from a merger
of black holes.

The detection was actually made on June 8, 2017 02:01:16 UTC
but its announcement was delayed whilst they processed the two other
recent discoveries, including the neutron star merger.

Press release here including links to other resources, such as a science fact sheet :-
http://www.ligo.org/detections/GW170608.php

Paper on arXiv here :-
http://www.ligo.org/detections/GW170..._submitted.pdf

LIGO news article here :-
https://www.ligo.caltech.edu/news/ligo20171115

Quote:
Originally Posted by LIGO
Dubbed GW170608, the latest discovery was produced by the merger of two relatively light black holes, 7 and 12 times the mass of the sun, at a distance of about a billion light-years from Earth. The merger left behind a final black hole 18 times the mass of the sun, meaning that energy equivalent to about 1 solar mass was emitted as gravitational waves during the collision.

This event, detected by the two NSF-supported LIGO detectors at 02:01:16 UTC on June 8, 2017 (or 10:01:16 pm on June 7 in US Eastern Daylight time), was actually the second binary black hole merger observed during LIGO's second observation run since being upgraded in a program called Advanced LIGO. But its announcement was delayed due to the time required to understand two other discoveries: a LIGO-Virgo three-detector observation of gravitational waves from another binary black hole merger (GW170814) on August 14, and the first-ever detection of a binary neutron star merger (GW170817) in light and gravitational waves on August 17.
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