TITLE: GCN CIRCULAR NUMBER: 11905 SUBJECT: GRB 110407A: MITSuME Okayama and Ishigakijima Optical upper limits DATE: 11/04/08 02:55:55 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 110407A (Wolf et al., GCN 11894) 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 (Evans et al., GCNC 11903) in all the three bands. We could not detect the previously reported afterglow (Chuang et al., GCN 11899). Three sigma upper limits of the OT are listed below. We used SDSS catalog for flux calibration. Okayama Astrophysical Observatory: The observation started on 2011-04-07 14:08:27, (1.8 min after the burst). T0+[day] MID-UT T-EXP[sec] g' Rc Ic ------------------------------------------------------ 0.00472 14:13:28 540.0 >19.3 >19.1 >18.2 0.07701 15:57:35 6840.0 >20.3 >20.2 >19.4 ------------------------------------------------------ T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec] Ishigakijima Astronomical Observatory: The observation started on2011-04-07 15:51:28 UT, (1.7 h after the burst). T0+[day] MID-UT T-EXP[sec] g' Rc Ic ------------------------------------------------------ 0.12244 17:02:59 1080.0 >20.9 >20.7 >19.7 ------------------------------------------------------ T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec]