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GCN Circular 8343

GRB 081008: ROTSE-III Detection of Optical Counterpart
2008-10-08T20:04:04Z (16 years ago)
Eli Rykoff at UCSB <>
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 081008 (Swift trigger 331093). The first image was at 
19:58:51.3 UT, 41.9 s after the burst (8.3 s after the GCN notice time). 
The unfiltered images are calibrated relative to USNO A2.0. We detect a 
14.5 magnitude, brightening source with coordinates:

      18:39:50.0      -57:25:52.0    (J2000), with positional 
uncertainty of 1" or better

start UT    	mag     mlim(of image)
19:58:51.3     14.5     16.2

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

A jpeg image is available at

Continuing observations are in progress.
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