GCN Circular 8536
Subject
GRB 081121: ROTSE-III Detection of Optical Counterpart
Date
2008-11-21T20:41:23Z (15 years ago)
From
Fang Yuan at ROTSE <yuanfang@umich.edu>
F. Yuan (U Mich), W. Rujopakarn (Steward) report on behalf of the ROTSE
collaboration:
ROTSE-IIIc, located at the H.E.S.S. site at Mt. Gamsberg, Namibia,
responded to GRB 081121 (Swift trigger 335105). The first image was at
20:36:30.0 UT, 57.2 s after the burst (8.9 s after the GCN notice time).
The unfiltered images are calibrated relative to USNO A2.0. We detect a
11.6 magnitude, fading source with coordinates:
05:57:06.1 -60:36:10.3 (J2000), with positional uncertainty
of 1" or better
start UT mag mlim(of image)
----------------------------------
20:36:29.9 11.6 15.7
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/gsb335105_3c00_img.jpg Note that the object
marked 4 is the candidate in question.
Continuing observations are in progress.
