TITLE: GCN CIRCULAR NUMBER: 13171 SUBJECT: GRB 120328A: MITSuME Ishigakijima Optical Upper Limits DATE: 12/03/29 14:08:13 GMT FROM: Daisuke Kuroda at OAO/NAOJ D. Kuroda (OAO, NAOJ), H. Hanayama, T. Miyaji, J. Watanabe (IAO, NAOJ), K. Yanagisawa (OAO, NAOJ), S.Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto) and N. Kawai(Tokyo Tech) report on behalf of the MITSuME collaboration: We observed the field of GRB 120328A (Pagani et al., GCNC 13147) with the optical three color (g', Rc and Ic) CCD camera attached to the Murikabushi 1m telescope of Ishigakijima Astronomical Observatory. The observation started on 2012-03-28 18:34:18 UT (~15.5 h after the burst). We did not find any new point source within the enhanced XRT error circle (Beardmore et al., GCNC 13153) in all the three bands. Three sigma upper limits of the OT are listed below. We used GSC2.3 catalog for flux calibration. #T0+[day] MID-UT T-EXP[sec] g' Rc Ic ---------------------------------------------------------------------- 0.68772 19:36:38 4800.0 >20.1 >20.4 >19.3 ---------------------------------------------------------------------- T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec]