GCN Circular 8754
Subject
GRB 081230: ROTSE-III Detection of Optical Counterpart
Date
2008-12-30T21:20:41Z (15 years ago)
From
Fang Yuan at ROTSE <yuanfang@umich.edu>
F. Yuan (U Mich), E.S. Rykoff (UCSB), report on behalf of the ROTSE
collaboration:
ROTSE-IIIc, located at the H.E.S.S. site at Mt. Gamsberg, Namibia,
responded to GRB 081230 (Swift trigger 338633). The first image was at
20:47:53.4 UT, 700.8 s after the burst (8.4 s after the GCN notice
time). The unfiltered images are calibrated relative to USNO A2.0. We
detect a 19.1 magnitude, steady source in the XRT error box with
coordinates:
02:29:19.35 -25:08:49.22 (J2000), with positional
uncertainty of 1" or better
start UT mag mlim(of image)
----------------------------------
20:49:23.0 19.1 19.2
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/gsb338633_3c021-030_key.jpg
Continuing observations are in progress.
