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GCN Circular 12713

GRB 111210A: optical upper limit of Mt. Terskol observatory
2011-12-22T14:48:58Z (12 years ago)
Alina Volnova at SAI MSU <>
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 the field of GRB 111210A (Siegel et al., GCN 12650) with
Zeiss-600 telescope of Mt.Terskol observatory on Dec 11 between
01:06:25 and 03:09:45 UT under poor weather condition and mean seeing
of about 2.2". We took 120 frames in R-band with exposure of 60
seconds. In a stacked frame we did not detect any source within the
enhanced XRT error circle (Goad et al., GCN 12652). The photometry of
the field is based on a few stars from USNO-B1.0 catalogue.

t-t0 � � � � � � � filter � exp. � � � �OT � �uplim (3sigma)
(mid., days) � � � � � �(s)

0.48006 � � � � R � � �120x60 � �n/d � � 18.6
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