GCN Circular 3836
Subject
GRB 050820: Early RAPTOR detections
Date
2005-08-20T18:49:51Z (19 years ago)
From
James Wren at LANL <jwren@nis.lanl.gov>
J. Wren, W. T. Vestrand, P. Woznaik, S. Evans, R. White report
on behalf of the RAPTOR team at Los Alamos National Laboratory:
The RAPTOR system of robotic telescopes responded to GRB 050820
(Swift trigger 151207) beginning at 06:35:20.46 UT, 5.5 seconds
after the GCN notice was sent. We detect the object reported by
Fox and Cenko (GCN 3029). Our early images show the source
rising rapidly to a unfiltered peak magnitude of ~14.5. We confirm
the Fox and Cenko observation that the source reaches
a peak brightness approximately 8 minutes after the burst and
then begins a steady power law decline.