TITLE: GCN CIRCULAR NUMBER: 11711 SUBJECT: GRB110212A: MITSuME Okayama optical upper limits DATE: 11/02/13 08:42:44 GMT FROM: Daisuke Kuroda at OAO/NAOJ D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (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 110201A (D'Elia et al., GCN 11699) with the optical three color (g', Rc and Ic) CCD camera attached to the MITSuME 50cm telescope of Okayama Astrophysical Observatory. The observation started on 2011-02-12 11:11:56 UT (~10 hours after the burst). We did not find any new point source within the BAT refined error circle (Ukwatta et al., GCNC 11703) 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 ------------------------------------------------------ 0.46043 12:12:08 5880.0 >20.0 >19.7 >19.0 ------------------------------------------------------ T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec]