GCN Circular 13988
Subject
GRB 121123A: optical observations
Date
2012-11-24T01:50:55Z (11 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@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