TITLE: GCN CIRCULAR NUMBER: 13570 SUBJECT: GRB 120803B: MITSuME Akeno Optical upper limits DATE: 12/08/03 14:36:09 GMT FROM: Yoichi Yatsu at Tokyo Tech. R. Usui, Y.Aoki, S. Kurita, T. Yoshii, M. Hayashi, Y. Saito, Y. Yatsu, and N. Kawai (Tokyo Tech) report on behalf of the MITSuME collaboration: We observed GRB 120803B ( Racusin et al., GCN Circular #13566) with the optical three color (g, Rc, and Ic) CCD cameras attached to the MITSuME 50 cm telescope of Akeno Observatory, Yamanashi, Japan. The observation started on 2012-08-03 11:07:28 UT ( ~ 82 sec after the burst). And we did not find any new point source within the XRT error circle in the three bands. The results of photometry (3sigma upper limits) are listed below. The photon flux were calibrated against GSC2.3 catalog. T0+[sec] MID-UT T-EXP[sec] g' Rc Ic ------------------------------------------------------------------------------------------- 82 11:09:51 240 > 18.0 > 18.0 > 17.3 376 11:53:57 3600 >19.2 376 11:53:32 3660 >18.9 376 11:53:02 3720 >18.3 ------------------------------------------------------------------------------------------- T0+ : Elapsed time after the burst [sec] T-EXP: Total Exposure time [sec] [GCN OPS NOTE(04aug12): Per author's request, the "120803A" in the Subject-line was changed to "120803B".]