TITLE: GCN CIRCULAR NUMBER: 12929 SUBJECT: GRB 120211A: MITSuME Okayama and Ishigakijima Optical upper limits DATE: 12/02/12 08:25:15 GMT FROM: Daisuke Kuroda at OAO/NAOJ D. Kuroda, (OAO, NAOJ), H. Hanayama (IAO, NAOJ), K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ), T. Miyaji J. Watanabe, (IAO, 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 120211A (Sonbas et al., GCNC 12920) with the optical three color (g', Rc and Ic) CCD camera attached to the MITSuME 50cm telescope of Okayama Astrophysical Observatory and the Murikabushi 1m telescope of Ishigakijima Astronomical Observatory. We did not find any new point source within the enhanced XRT error circle (Goad et al., GCNC 12922) in all the three bands. Three sigma upper limits of the OT are listed below. We used GSC2.3 catalog for flux calibration. Okayama Astrophysical Observatory: The observation started on 012-02-11 11:59:56 UT (~1.5 min after the burst). T0+[day] MID-UT T-EXP[sec] g' Rc Ic ------------------------------------------------------ 0.00444 12:04:52 540.0 >19.5 >19.5 >19.0 0.04267 12:59:55 6360.0 >20.3 >20.2 >19.7 ------------------------------------------------------ T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec] Ishigakijima Astronomical Observatory: The observation started on 2012-02-11 12:43:55 UT (~45 min after the burst). T0+[day] MID-UT T-EXP[sec] g' Rc Ic ------------------------------------------------------ 0.04104 12:57:34 1260.0 >20.8 >20.5 >19.0 ------------------------------------------------------ T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec]