[vsnet-grb-info 13070] GRB 130420A: ROTSE-III Detection of Optical Counterpart
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Sat Apr 20 17:08:56 JST 2013
TITLE: GCN CIRCULAR
NUMBER: 14407
SUBJECT: GRB 130420A: ROTSE-III Detection of Optical Counterpart
DATE: 13/04/20 08:08:48 GMT
FROM: Tolga Guver at UA <tolga at physics.arizona.edu>
GRB 130420A: ROTSE-III Detection of Optical Counterpart
T. Guver (Sabanci U), report on behalf of the ROTSE collaboration:
ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB 130420A (Swift trigger 553977). The first image was at 07:29:51.5 UT, 82.0 s after the burst (7.5 s after the GCN notice time). The unfiltered images are calibrated relative to USNO A2.0. We detect a 15.5 magnitude, fading source with coordinates:
13:04:25.5 +59:25:27.2 (J2000), with positional uncertainty of 1" or better
start UT mag mlim(of image)
----------------------------------
07:34:12.7 15.5 16.5
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/gsq553977_3b03_img.jpg Note that the object marked 91 is the candidate in question.
Continuing observations are in progress.
More information about the vsnet-grb-info
mailing list