GCN Circular 16403
A. Volnova (IKI), E. Klunko (ISTP), M. Eselevich (ISTP), I. Korobtsev (ISTP), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed a field of the GBM GRB 140606B / iPTF 14bfu (Singer et al., GCN 16360) with with AZT-33IK telescope of Sayan observatory (Mondy). We obtained several images on June, 08 (UT) 17:17:29 with exposure of each frame of 120 s. The optical transient Singer et al., GCN 16360) is well detected on the stacked image. A photometry is based on nearby USNO-B1.0 stars: date UT start t-T0 Filter Exp. OT (mid, days) (s) 2014-06-08 17:17:29 2.62892 R 60*120 22.00+/-0.12 The finding chart can be found in http://grb.rssi.ru/GRB140606B/grb140606B_AZT33IK_R_fc.png The light curve based on published photometry in r, R and unfiltered observations (GCNs 16360, 16362, 16367, 16398) can be found in http://grb.rssi.ru/GRB140606B/grb140606B_lc.png Based on the lc above one can suggest that a host galaxy of GRB 140606B may influence on the photometry of the afterglow.