TITLE: GCN CIRCULAR NUMBER: 13956 SUBJECT: GRB 121108A: MITSuME Ishigakijima upper limits DATE: 12/11/09 01:38:02 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 121108A (Ukwatta et al., GCNC 13952) 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 2012-11-08 18:29:39 UT (~42 min after the burst). We did not find any new point source within the XRT circle (Ukwatta et al., GCNC 13952) 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 ------------------------------------------------------ 0.06526 19:21:37 5820.0 >22.6 >22.0 >20.0 ------------------------------------------------------ T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec]