GCN Circular 11032
Subject
GRB 100802A: Possible Swift/UVOT Detection of Optical Afterglow
Date
2010-08-02T06:21:36Z (14 years ago)
From
Mike Siegel at PSU/Swift MOC <siegel@astro.psu.edu>
M. H. Siegel (PSU) and E. Troya (NASA/GSFC/ORAU) report on behalf of the
Swift/UVOT team:
UVOT took a finding chart exposure of 250 seconds with the U filter
starting
301 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 00:09:52.47 = 2.46862
DEC(J2000) = +47:45:19.1 = 47.75531
with a 90%-confidence error radius of about 0.78 arc sec. This
position is 4.3
arc sec. from the center of the XRT error circle. The estimated
magnitude is
19.56 with a 1-sigma error of about 0.21. No correction has been made
for the
expected extinction corresponding to E(B-V) of 0.12.