TITLE: GCN CIRCULAR NUMBER: 20242 SUBJECT: GRB 161129A: KWFC z-band photometry DATE: 16/12/08 09:21:59 GMT FROM: Tomoki Morokuma at U of Tokyo Tomoki Morokuma and Yuki Sarugaku (Univ. of Tokyo) report on behalf of the OISTER collaboration: We observed the field of GRB 161129A (Kocevski et al. GCN 20210) with the 1.05-m Schmidt telescope and KWFC (Sako et al. 2012, Proc. SPIE 8446, 84466L) at Kiso Observatory in Japan. The observations were made in z-band at 2016-11-29 08:15-08:36 (UT; about 1 hour after the burst). The flux is calibrated with z-band imaging data for a nearby SDSS field taken at almost the same airmass as that of the GRB field. We do not detect any new source within the XRT error circle or at the position with Swift/UVOT and other telescopes' detections (e.g., Kuin et al. GCN 20217) and the upper limits are as follows. # ------------------------------------------------ # MID-MJD MID-UT t_exp z_lim # ------------------------------------------------ 57721.3442 08:15:36 60.0 16.9 57721.3477 08:20:44 120.0 17.7 57721.3513 08:25:50 180.0 18.3 57721.3542 08:30:08 180.0 18.6 57721.3573 08:34:25 180.0 18.7 # ------------------------------------------------ MID-MJD [day] : MJD in the middle of exposure MID-UT : UT in the middle of exposure t_exp [sec] : Exposure time z_lim : 5-sigma limiting magnitude (AB)