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GCN Circular 7846

GRB 080607: ROTSE-III Detection of Optical Counterpart
2008-06-07T06:11:50Z (16 years ago)
Wiphu Rujopakarn at U AZ/Steward <>
W. Rujopakarn (Steward), E.S. Rykoff (UCSB), report on behalf of the ROTSE

ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB
080607 (Swift trigger 313417). The first image was at 06:07:49.0 UT, 22.0
s after the burst (6.0 s after the GCN notice time). The unfiltered images
are calibrated relative to USNO A2.0. We detect a 14.8 magnitude, fading
source with coordinates:

     12:59:47.3      +15:55:10.8    (J2000), with positional uncertainty
of 1" or better

start UT    	mag     mlim(of image)
06:07:49.0     14.8     16.4

This source is not visible in DSS (second epoch), 2MASS or the MPChecker

A jpeg image is available at Note that the object
marked 11 is the candidate in question.

Continuing observations are in progress.
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