GCN Circular 6734
Subject
GRB 070810: ROTSE-III Detection of Optical Counterpart
Date
2007-08-10T03:12:03Z (17 years ago)
From
Heather Swan at U.of Michigan/ROTSE <hflewell@umich.edu>
H. Swan (U Mich), B. E. Schaefer (Louisiana State), E.S. Rykoff (U
Mich), report on behalf of the ROTSE collaboration:
ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB
070810 (Swift trigger 287364). The first image was at 02:34:02.5 UT,
1330.5 s after the burst. The unfiltered images are calibrated relative
to USNO A2.0. We detect a 16.7 magnitude, fading source with coordinates:
12:39:51.48 +10:45:00.90 (J2000).
The source is blended with a nearby USNO star visible in the DSS, and
thus our initial positional uncertainty is ~3".
start UT mag mlim(of image)
----------------------------------
02:29:53.4 16.7 18.5
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/gsb0174_3b01_img.jpg
Continuing observations are in progress.
