GCN Circular 10695
Subject
GRB 100423A: CrAO optical observations
Date
2010-04-27T09:52:28Z (14 years ago)
From
Alina Volnova at SAI MSU <alinusss@gmail.com>
V. Rumyantsev, D. Shakhovskoy (CrAO), A. Volnova (SAI MSU), A.
Pozanenko (IKI) report on behalf of larger GRB follow-up
collaboration:
We observed the field of the Swift GRB 100423A (Stroh et al., GCN
10651) with AZT-11 telescope of CrAO Observatory between (UT) Apr. 23
18:15 - 18:46. We do not detect source at the position of the
afterglow (Filgas et al., GCN 10652; Ivarsen et al., GCN 10653).
The upper limit of the stacked image based on USNO-B1.0 star
1115-0180143 (RA(J2000) = 09 05 44.73 Dec(J2000)= +21 31 14.0) and
assuming R=17.21 is following:
T0+ Filter, Exposure, mag.
(mid, d) (s)
0.7489 R 11x180 >20.7
The upper limit is compatible with power-law decay index -1.1 reported
by Ivarsen et al. (GCN 10653).