GCN Circular 7061
Subject
GRB 071112C: ROTSE-III Confirmation of Optical Counterpart
Event
Date
2007-11-12T19:43:56Z (18 years ago)
From
Fang Yuan at ROTSE <yuanfang@umich.edu>
F. Yuan (U Mich), E.S. Rykoff (UCSB), W. Rujopakarn (Steward), H. Swan
(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 071112C (Swift trigger 296504; Perri, M. et. al., GCN
7059). The first image was at 18:34:01.8 UT, 64.3 s after the burst
(10.8 s after the GCN notice time). We detect the OT reported in GCN
7059. The magnitude of the OT was roughly constant for the first few
hundred seconds and then faded rapidly afterward. Further analysis is
ongoing. The unfiltered images are calibrated relative to USNO B1.0.
Midtime UT mag magerror mlim(of image)
--------------------------------------------------------------------
18:34:56.4 17.3 0.2 17.1
18:38:52.2 17.1 0.1 18.0
18:47:46.5 18.9 0.3 18.4
A jpeg image of the OT (object 82) is available at
http://www.rotse.net/images/gsb296504_3c011-020_key.jpg
Continuing observations are in progress.