TITLE: GCN CIRCULAR NUMBER: 11041 SUBJECT: GRB100802A: MITSuME optical upper limits DATE: 10/08/03 05:46:22 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 100802A (Troja et al., GCNC 11031) 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 2010-08-02 11:43:26 UT (~6 h after the burst). We did not find any new point source within the XRT error circle and the enhanced XRT error circle (Evans et al., GCNC 11036) in all the three bands. Also, we could not detect the previously reported afterglow (Siegel and Troya, GCN 11032). Three sigma upper limits of the OT are listed below. We used GSC 2.3 catalog for flux calibration. T0+[day] MID-UT T-EXP[sec] g' Rc Ic ------------------------------------------------------ 0.29658 12:52:41 9480.0 >19.9 >19.8 >19.3 ------------------------------------------------------ T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec]