TITLE:   GCN CIRCULAR
NUMBER:  20279
SUBJECT: GRB 161214B: AbAO and ISON/Terskol optical observations
DATE:    16/12/17 07:25:30 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

E. Mazaeva (IKI), R. Inasaridze (AbAO),  A. Mokhnatkin (KIAM),  A. Pozanenko 
(IKI), A. Volnova (IKI),  V. Ayvazian  (AbAO), V. Zhuzhunadze,  (AbAO), 
O.Kvaratskhelia  (AbAO), G. Inasaridze (AbAO),  I. Molotov (KIAM)  report on 
behalf of  larger GRB follow-up collaboration:



We observed the field of  GRB 161214B  (D'Avanzoet al., GCN 20257) with 
AS-32 (0.7m) telescope of Abastumani Observatory  and with K-800 (0.8m) 
telescope  of ISON/Terskol   observatory  on December, 15.  We obtained 
several unfiltered images in each observatory. 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 15:31:49  0.97738   CR     85*60   18.79   0.05  22.2  AS-32
2016-12-15 18:07:05  1.06047   CR    142*30  18.76   0.13  21.4  K-800

Photometry is based on R-magnitudes the same stars used in (Mazaeva et al., 
GCN  20275)