[vsnet-grb-info 2374] GRB 051109: ROTSE-III Detection of Possible Counterpart

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4211
SUBJECT: GRB 051109: ROTSE-III Detection of Possible Counterpart 
DATE:    05/11/09 01:21:11 GMT
FROM:    Eli Rykoff at U of Michigan/ROTSE  <erykoff at umich.edu>

E.S. Rykoff (U Mich), B. Schaefer (Louisiana State), W. Rujopakarn (U 
Mich), F. Yuan (U Mich), R. Quimby (U Texas), report on behalf of the 
ROTSE collaboration:

ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB 
051109 (Swift trigger 163136). The first image was at 01:12:52.7 UT, 
32.1 s after the burst (4.7 s after the GCN notice time). The unfiltered 
images are calibrated relative to USNO A2.0. We detect a new object, not 
visible in the DSS (second epoch), with coordinates:

      22:01:15.3      +40:49:23.3    (J2000)

start UT    	mag     mlim(of image)
----------------------------------
01:12:52.7     15.4     16.8


Continuing observations are in progress.