AAS 206th Meeting, 29 May - 2 June 2005
Session 47 Gamma Ray Bursts
Poster, Wednesday, 10:00am-7:00pm, Thursday, 9:20am-2:00pm, June 1, 2005, Ballroom A

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[47.02] A Search for Bright Gamma-Ray Burst Beforeglows using the Night Sky Live Global Network

V. Tilvi, D. Cordell, M. Merlo, W. Pereira, V. Muzzin, L. Shamir, R. J. Nemiroff (Michigan Tech.), Night Sky Live Collaboration

Observations of optical counterparts to gamma-ray bursts (GRBs) usually start after a satellite-specific GRB trigger time and are known as optical afterglows. The satellite trigger time may occur well after the arrival time of a bright precursor, however, or even well after a main explosion was visible. The continuous nature of the Night Sky Live (NSL) global network of optical fisheye CONCAMs allows a search of the night sky at times before a GRB trigger. Such emission is referred to here as beforeglow. Reported here is a search for optical beforeglows in NSL data to magnitudes as dim as visual magnitude five for several hours before the GCN-recorded trigger times of HETE, Swift, and the IPN.

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Bulletin of the American Astronomical Society, 37 #2
© 2005. The American Astronomical Soceity.