TITLE: GCN CIRCULAR NUMBER: 20046 SUBJECT: GRB 161014A: Continued MITSuME Akeno Optical Observation DATE: 16/10/15 11:33:51 GMT FROM: Taketoshi Yoshii at Tokyo Tech K.Morita, T.Fujiwara, Y. Saito, Y. Ono, T. Yoshii, H. Ohuchi, Y.Tachibana, Y. Yano, S. Harita, Y.Muraki, K.Saisho, T.Ozawa, Y. Yatsu, and N. Kawai (Tokyo Tech) report on behalf of the MITSuME collaboration: We have been observing the optical counterpart of GRB 161014A (J. L. Racusin et al., GCN Circular #20035) 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 on 2016-10-14 12:32:08 UT (46 sec after the burst) and we detected the optical counterpart in all three bands. The measured magnitudes were listed as follows. We obtained following results for the magnitudes. T0+[sec] MID-UT T-EXP[sec] g' Rc Ic ------------------------------------------------------------------------------------------------------- 46 12:34:48 270 16.67 +/- 0.13 15.69 +/- 0.08 15.40 +/- 0.07 376 13:03:53 1380 > 18.57 17.59 +/- 0.17 17.86 +/- 0.25 ------------------------------------------------------------------------------------------------------- T0+ : Elapsed time after the burst T-EXP: Total Exposure time We used GSC2.3 catalog for flux calibration.