[vsnet-grb-info 12628] GRB 121123A: optical observations
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Sat Nov 24 10:51:02 JST 2012
TITLE: GCN CIRCULAR
NUMBER: 13988
SUBJECT: GRB 121123A: optical observations
DATE: 12/11/24 01:50:55 GMT
FROM: Alexei Pozanenko at IKI, Moscow <apozanen at iki.rssi.ru>
A. Volnova (SAO MSI, IKI), A. Stepura (UAFO), A. Matkin (UAFO), D.
Erofeev (UAFO), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf
of larger GRB follow-up collaboration:
We observed the field of the Swift GRB 121123A (Helder et al., GCN
13982) with VT-50 (0.5-m) telescope and GAS-250 of UAFO/ISON-Ussuriysk
observatory starting on Nov. 23 (UT) 10:10:15, i.e. 6 minutes after
burst trigger. We took several unfiltered images of 30 s. We do not
detect detect afterglow (Helder et al., GCN 13982; Zhao et al., GCN
13983) in a stacked images. Preliminary photometry of a stacked image
obtained with VT-50 is based on USNO-B1.0 stars (R2):
T_start T0+, Filter, exposure, UL (3 sigma)
(UT) mid (d) (s)
10:10:15 0.02793 none 90x30 18.1
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