TITLE: GCN CIRCULAR NUMBER: 17578 SUBJECT: GRB 150314A: MITSuME Akeno upper limits DATE: 15/03/14 14:14:18 GMT FROM: Taketoshi Yoshii at Tokyo Tech T. Yoshii, Y. Saito, Y. Tachibana, H. Ohuchi, Y. Yano, S. Kurita, Y. Ono, T. Fujiwara, Y. Yatsu, and N. Kawai (Tokyo Tech) report on behalf of the MITSuME collaboration: We searched for the optical counterpart of GRB 150314A (L. M. Z. Hagen et al., GCN Circular #17573) with the optical three color (g', Rc, and Ic) CCD cameras attached to the MITSuME 50 cm telescope of Akeno Observatory, Yamanashi, Japan. The observation started at 2015-03-14 05:21:32 UT (~5.4 h after the burst). We could not find any new point source within the refined XRT-UVOT alignment error circle (A.P. Beardmore et al., GCN Circular #17575) in all the three bands. The obtained upper-limits are listed below. T0+[sec] MID-UT T-EXP[sec] g' Rc Ic ----------------------------------------------------------------------------- 19292 11:19:44 6840 >21.6 >21.1 >20.1 ----------------------------------------------------------------------------- T0+ : Elapsed time after the burst T-EXP: Total Exposure time We used GSC2.3 catalog for flux calibration.