Electromagnetic Follow-up of Gravitational-Wave Transient Candidates

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

In the 2009-2010 science run of the LIGO and Virgo instruments, low-latency searches for gravitational-wave transients were implemented. Such searches allowed prompt identification and sky localization of gravitational-wave candidates that may originate from highly energetic astrophysical events like core-collapse supernovae and compact-binary mergers. Starting from these low-latency searches we have implemented for the first time in LIGO-Virgo an electromagnetic follow-up program of gravitational-wave candidate events. This program aims to search for electromagnetic counterparts to gravitational-wave sources by pointing promptly to candidate source locations with ground-based wide-field optical telescopes and the Swift X-ray satellite. The program's role in providing confidence in the first detection and understanding the source astrophysics is expected to be significant. We describe the challenges we have addressed, the overall implementation of the low-latency search for transients, and the current status of this program. We also discuss its prospects when LIGO and Virgo return to coincidence running in the advanced detector regime in 2015.

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