TITLE:   GCN CIRCULAR
NUMBER:  11086
SUBJECT: GRB 100814A: ROTSE-III Detection of Optical Counterpart 
DATE:    10/08/14 04:14:34 GMT
FROM:    Brad Schaefer at LSU  <schaefer@grb.phys.lsu.edu>

B. E. Schaefer (Louisiana State), E.S. Rykoff (UCSB), W. Rujopakarn 
(Steward), S. B. Pandey (U Mich), W. Zheng (U Mich), report on behalf of 
the ROTSE collaboration:

ROTSE-IIIc, located at the H.E.S.S. site at Mt. Gamsberg, Namibia, 
responded to GRB 100814A (Swift trigger 431605). The first image was at 
03:55:01.1 UT, 289.8 s after the burst (4.1 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), nor in our first set of 
observations with coordinates:

     01:29:53.67      -17:59:41.58    (J2000), with positional uncertainty 
of 1" or better

start UT    	mag     mlim(of image)
----------------------------------
03:55:11.3     17.4     8.0 


A jpeg image is available at 
http://www.rotse.net/images/gsq431605_3c011-020_key.jpg Note that the 
object marked 29 is the candidate in question.

Continuing observations are in progress.