TITLE:   GCN CIRCULAR
NUMBER:  12704
SUBJECT: GRB 111211A: optical ovservations at  Mt. Terskol observatory 
DATE:    11/12/19 19:48:14 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

A.Volnova (SAI MSU), M. Andreev, A. Sergeev  (Terskol Branch of INASAN), V. 
Petkov (Baksan Neutrino Observatory of INR), N. Karpov, O. Andrienko, K. 
Martynyuk-Lototsky, N. Parakhin, N. Borachok, V. Kozlov, G. Butenko, V. 
Godunova (IC AMER, NASU), A. Pozanenko (IKI) report:

We observed field of the SuperAGILE GRB 111211A  (Lazzarotto et al. GCN 
12666) with  Zeiss-600 telescope of Mt.Terskol observatory in R filter 
between Dec. 12 (UT) 23:09:07 -- Dec.13 00:55:27.   We took several images 
of 60 exposure under good weather conditions and mean seeing (FWHW) of about 
1.8". We  detect the source reported as candidate in afterglow  (Kann et 
al., GCN 12668; Kruehler et al., GCN 12675). A photometry is based on the 
USNO-B1.0 1011-0183238 (10:12:26.16 +11:11:26.6) star assuming R = 14.41.

  T0+      Filter,  Exposure, OT,                  UpperLimit
(mid, d)               (s)

1.07273  R       104x60    19.25 +/- 0.10  20.0