LIGO scientists were able to identify the wide patch of sky where the black
hole merger took place but were unable to pinpoint its exact location.
By timing the arrivals of the signals at all three detectors, which differ by milliseconds, researchers were able to determine that the black
hole merger took place somewhere within a 60 - square - degree patch of sky in the Southern Hemisphere.
Not exact matches
And last week, LIGO said it had found two «triggers» in new data
taken since November 2016 — which could also end up being black
hole mergers.
LIGO scientist David Reitze
takes us on a 1.3 billion year journey that begins with the violent
merger of two black
holes in the distant universe.