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Shouldn't we have multiple detectors, to determine which direction the waves are coming from? (Like an antenna array can also be direction-specific using computational techniques).

Or are these detectors already directionally sensitive?




LIGO is based on two detectors, one in Louisiana and one in Washington. With those, according to today's talk, we can get a rough idea of the direction of the source: it was in the southern sky, vaguely in the direction of the Magellanic Clouds. Once some of the other planned experiments come online over the next few years, they expect to be able to localize sources to within 5-10 degrees on the sky. (Or so I just heard from the press conference.)




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