[vsnet-grb-info 11131] GRB 111103B: optical upper limit of Mt. Terskol observatory

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  12546
SUBJECT: GRB 111103B: optical upper limit of Mt. Terskol observatory   
DATE:    11/11/08 22:20:22 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at 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 Swift  GRB 111103B  (Grupe  et al. GCN  12519) with
Zeiss-600 telescope of Mt.Terskol observatory in R filter between Nov. 3
(UT) 15:07:44 - 15:17:50.   We took 10 images of 60 exposure under good
weather conditions and mean seeing (FWHW) of about 1.6". We do not detect
any source within enhanced XRT  position (Goad et al., GCN 12525). A
photometry is based on the USNO B1.0 nearby stars.

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

0.17619  R         10x60       n/d   17.5