[vsnet-grb-info 2410] GRB 051111A: ROTSE-III Detection of Possible Counterpart

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4247
SUBJECT: GRB 051111A: ROTSE-III Detection of Possible Counterpart
DATE:    05/11/11 06:08:00 GMT
FROM:    Wiphu Rujopakarn at U Michigan/ROTSE  <wiphu at umich.edu>

W. Rujopakarn (U Mich), H. Swan (U Mich), E.S. Rykoff (U Mich), B. Schaefer 
(Louisiana State), report on behalf of the ROTSE collaboration:

ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB 051111A 
(Swift trigger 163438). The first image was at 06:00:08.4 UT, 26.9 s after 
the burst (6.4 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:

     23:12:33.2      +18:22:29.1    (J2000)

start UT     mag     mlim(of image)
----------------------------------
06:00:08.4     13.0     15.6


Continuing observations are in progress.