TITLE:   GCN CIRCULAR
NUMBER:  20275
SUBJECT: GRB 161214B: Mondy optical observations
DATE:    16/12/16 18:12:42 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

E. Mazaeva (IKI), A. Pozanenko (IKI), E. Klunko (ISTP), A. Volnova
(IKI), I. Korobtsev (ISTP)  report on behalf of larger GRB follow-up
collaboration:

We observed the field of  GRB 161214B  (D'Avanzoet al., GCN 20257) with 
AZT-33IK telescope of Sayan observatory (Mondy) starting on December, 15 
(UT) 13:22:26. We obtained several images in R-filter.
The source previously reported (Malesani et al. GCN 20260; Marshall et 
al. GCN 20261) is clearly visible. Preliminary photometry of the source 
is following

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

2016-12-15 13:22:26  0.85579  R     120*30    18.69   0.03  21.9

The photometry includes a catalogued star SDSS J001524.26+072108.5 
already mentioned by Malesani et al. (GCN 20260) and Marshall et al. 
(GCN 20268). The R magnitude of the star obtained by Lupton 
transformations is 18.83 +/- 0.03.

Photometry is based on nearby SDSS-DR9 stars
SDSS-DR9_id            R(Lupton)
J001520.09+072300.5    17.01
J001517.29+072310.4    17.05
J001513.07+071914.3    17.28
J001511.86+071859.3    16.07
J001513.35+071841.1    15.26
J001525.83+072141.2    14.31
J001524.40+072156.0    17.79
J001530.21+072230.9    16.94