TITLE: GCN CIRCULAR NUMBER: 20039 SUBJECT: GRB 161014A: Kanata optical observation DATE: 16/10/14 16:56:59 GMT FROM: Michitoshi Yoshida at HASC,Hiroshima U Nakaoka, T., Kawahara, N., Yang, C., Nagashima, H, Yoshida, M., Kawabata, K. (Hiroshima Univ.) on behalf of the OISTER collaboration We performed R band imaging observations around the error circle of GRB 161014A (Racusin et al., GCN 20035) with the optical imager HOWPol attached to Kanata telescope of Hiroshima University. The observation was made at 2016-10-14 12:32:48 UT (mid time of the observation). We detected the optical transient reported by Morita et al. (GCN 20036), Guidorzi et al. (GCN 20037) and Xin et al. (GCN 20038) in our R-band image. The detected magnitude and five sigma upper limit (in Vega magnitude) of the OT are listed below. # T0+ MID-UT T-EXP R mag. R err R limit ------------------------------------------------------- 86 12:32:48 30 15.1 0.2 17.0 ------------------------------------------------------- T0+ : Elapsed time after the burst [sec] T-EXP: Total Exposure time [sec]