TITLE: GCN CIRCULAR NUMBER: 14602 SUBJECT: GRB 130505A: MITSuME Akeno Optical observation DATE: 13/05/08 11:41:21 GMT FROM: Taketoshi Yoshii at Tokyo Tech T. Yoshii, Y. Yatsu, Y. Yano, R. Usui, Y. Tachibana, K. Ito, S. Kurita, Y. Saito, and N. Kawai (Tokyo Tech) report on behalf of the MITSuME collaboration: We observed GRB 130505A (Maselli et al., GCNC 14563) with an optical tri-color (g, Rc, and Ic) camera attached to the MITSuME 50 cm telescope of Akeno Observatory, Yamanashi, Japan. The observation started at 2013-05-05 11:04:17 UT (9709 sec after the trigger). And we detected the previously reported afterglow . The measured magnitudes were listed below. T0+[MID] MID-UT T-EXP[sec] g' Rc Ic ----------------------------------------------------------------------------------------------------- 15550s 12:41:38 3480 18.8+/-0.1 18.9+/-0.2 18.0+/-0.1 ----------------------------------------------------------------------------------------------------- T-EXP: Total Exposure time [sec] (The photon flux were calibrated against GSC2.3 catalog.)