GCN Circular 8056
Subject
GRB 080804: ROTSE-III Detection of Optical Counterpart
Date
2008-08-04T23:28:02Z (16 years ago)
From
Wiphu Rujopakarn at U AZ/Steward <wiphu@as.arizona.edu>
W. Rujopakarn (Steward), 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 080804 (Swift trigger 319016). The first image was at
23:20:34.3 UT, 19.6 s after the burst (6.3 s after the GCN notice time).
The unfiltered images are calibrated relative to USNO A2.0. We detect a
17.2 magnitude, brightening source with coordinates:
21:54:40.1 -53:11:03.8 (J2000), with positional uncertainty
of 1" or better
start UT mag mlim(of image)
----------------------------------
23:20:50.2 17.2 16.9
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/gsb319016_3c01_img.jpg Note that the object
marked 38 is the candidate in question.
Continuing observations are in progress.