TITLE:   GCN CIRCULAR
NUMBER:  16403
SUBJECT: GRB 140606B / iPTF 14bfu: Mondy optical observations
DATE:    14/06/14 16:46:44 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

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.