GCN Circular 7082
Subject
GRB071112C MITSuME Okayama Optical Observation
Event
Date
2007-11-13T23:06:45Z (19 years ago)
From
Michitoshi Yoshida at Okayama Astrophysical Obs <yoshida@oao.nao.ac.jp>
M. Yoshida, K. Yanagisawa, Y. Shimizu, S. Nagayama, H. Toda (OAO, NAOJ)
and N. Kawai (Tokyo Tech) report on behalf of the MITSuME collaboration:
We performed optical imaging observations (G, Rc and Ic) of the field of
GRB 071112C (Perri et al., GCN 7059) with 50cm MITSuME telescope at
Okayama Astrophysical Observatory from UT 18:35 to UT 19:52 on November
12 2007.
We found a fading source at the position of the optical afterglow
reported by several authors (Yuan et al., GCN 7061; Wang et al., GCN
7063; Burenin et al., GCN 7066; Chen et al., GCN 7067; Sollerman et al.,
GCN 7070) in all bands. We made flux calibration using USNO B1.0
catalog. The photometric results are following.
start-T end-T mid-T exp-T G Rc Ic
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18:35:34 18:36:34 18:36:04 1min 17.1+-0.1 17.0+-0.1 17.9+-0.1
18:35:34 18:39:00 18:37:17 3min 17.2+-0.1 17.2+-0.1 18.0+-0.1
18:39:12 18:45:09 18:42:10 5min 17.9+-0.1 18.0+-0.1 18.6+-0.1
18:45:19 18:56:20 18:50:49 7min 18.8+-0.2 18.5+-0.2 19.6+-0.2
18:56:30 19:08:46 18:32:38 10min 19.3+-0.4 19.0+-0.2 >19.8
19:08:56 19:57:01 19:32:58 40min >19.5 19.6+-0.2 >20.0
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