GCN Circular 6948
Subject
GRB 071020A: ROTSE-III Detection of Optical Counterpart
Date
2007-10-20T07:17:21Z (17 years ago)
From
Brad Schaefer at LSU <schaefer@grb.phys.lsu.edu>
B. E. Schaefer (Louisiana State), T.A. McKay (U Mich), F. Yuan (U Mich),
report on behalf of the ROTSE collaboration:
ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB
071020A (Swift trigger 294835). The first image was at 07:02:52.5 UT, 25.6
s after the burst (9.5 s after the GCN notice time). The unfiltered images
are calibrated relative to USNO A2.0. We detect a 13.6 magnitude, fading
source with coordinates:
07:58:39.9 +32:51:41.4 (J2000), with positional uncertainty
of 1" or better
start UT mag mlim(of image)
----------------------------------
07:02:52.9 13.6 16.4
This source is not visible in DSS (second epoch), 2MASS or the MPChecker
database.
A jpeg image is available at
http://www.rotse.net/images/gsb294835_3b00_img.jpg
Continuing observations are in progress.