Just Add Photons: Astrophysics From Ligo External Triggers

Details Just Add Photons: Astrophysics From Ligo External Triggers Just Add Photons: Astrophysics From Ligo External Triggers

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008head...10.0604o&link_type=abstract

American Astronomical Society, HEAD meeting #10, #6.04

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With LIGO sensitivity extending to astrophysically significant distances, gravitational wave detectors can now add value to sources detected by other means. As an example, we discuss GRB 070201, a short GRB whose error box intersects the spiral arms of the Andromeda galaxy (M31). Given the close proximity of M31, LIGO rules out a binary merger origin at and beyond the distance to M31, though the system remains consistent with a nearby SGR or a much more distant and accidentally coincident burst. Even without such fortuitously close events, because the time of the event is known (and in some cases because observations provide additional temporal structure, such as with SGR 1806-20) LIGO data can be searched in coincidence at a lower threshold than untriggered searches. Motivated by this and other examples, we briefly review the potential improvements given by triggered searches; discuss existing efforts to follow up external triggers such as GRBs; and describe the astrophysical benefits these searches will soon provide.

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