Because all three gravitational -
wave detectors saw the signal, physicists could triangulate and locate the source to within a 30 - square - degree patch of sky — about 60 times the size of the moon and much more precise than Fermi's localization.
Not exact matches
LIGO's Livingston
detector saw the
waves first, followed by the LIGO Hanford
detector 8 milliseconds later, and by the Virgo
detector another 6 milliseconds after that.
At 12:41 universal time on 17 August, physicists with three massive instruments — the twin 8 - kilometer - long
detectors of the Laser Interferometer Gravitational - Wave Observatory (LIGO) in Hanford, Washington, and Livingston, Louisiana, and the 6 - kilometer Virgo
detector near Pisa, Italy — spotted
waves unlike any
seen before.
As ground - based gravitational -
wave detectors get ready to score their first direct measurement of the ripples of spacetime, thoughts turn to space - based
detectors that could
see all the way back to the big bang
Further ahead, we might
see more sensitive gravitational
wave detectors, working at shorter wavelengths than LIGO.
At 7:41 a.m. local Livingston time that morning, the Fermi Gamma - ray Space Telescope, LIGO Hanford and the Virgo gravitational
wave detector in Europe had all detected two incredibly dense objects called neutron stars smashing into each other — an event some astronomers thought they would have to wait years or even decades to
see.