TITLE: GCN CIRCULAR NUMBER: 19128 SUBJECT: GRB 160303A: MITSuME Okayama upper limits DATE: 16/03/03 12:14:30 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 MITSuME and OISTER collaboration: We observed the field of GRB 160303A (Beardmore et al., GCNC 19126) 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 2016-03-03 10:57:10 UT (~2.5 min after the burst). We did not find any new point source within the XRT circle (Beardmore et al., GCNC 19126) in all the three bands. Three sigma upper limits of the OT are listed below. We used SDSS-DR8 catalog for flux calibration. #T0+[day] MID-UT T-EXP[sec] g' Rc Ic ----------------------------------------------------- 0.00532 11:02:21 540.0 >18.5 >18.6 >18.0 0.01940 11:22:38 2520.0 >19.5 >19.6 >19.0 ----------------------------------------------------- T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec]