TITLE:   GCN CIRCULAR
NUMBER:  20224
SUBJECT: GRB 161129A: ISON/UAFO optical observations
DATE:    16/12/01 09:40:34 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

E. Mazaeva (IKI),  E. Chornaya (UAFO, ISON), A. Cochergin (UAFO), I. Molotov 
(KIAM), A. Pozanenko (IKI) report on behalf of  larger GRB  follow-up 
collaboration:

We observed the field of  GRB 161129A  (Kocevski et al., GCN 20210) with 
SANTEL-650 (0.65m)  telescope  of UAFO/ISON-Ussuriysk observatory. We 
obtained several unfiltered images starting on  November 29 (UT) 11:47:34. 
We detected  optical afterglow (Mazaeva et al. GCN 20215; Klose et al. GCN 
20216; Kuin et al. GCN 20217). Preliminary photometry of a combined image is 
following

Date             UT start      t-T0        Filter  Exp.     OT     Err.  UL
                                       (mid, days)         (s)

2016-11-29 10:46:15  0.16055  CR      27*60 19.90  0.08  22.5
2016-11-29 11:19:35  0.18449  CR      30*60 19.95  0.09  22.5


Photometry is based on nearby USNO-B1.0 stars
USNO-B.1_id    R2
1221-0612083 17.30
1221-0612140 19.02