GCN Circular 10822
Subject
GRB 100111A: Maidanak optical observations
Date
2010-06-01T20:34:43Z (14 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (SAI MSU), M. Ibrahimov, R. Karimov (MAO), A. Pozanenko (IKI)
report on behalf of larger GRB follow-up collaboration:
We observed the afterglow of the Swift GRB 100111A (Vetere et al. GCN 10317)
with AZT-22 (1.5 m) telescope of Maidanak observatory (MAO) in R band on
Jan. 12 (UT) (00:44 - 01:32) under good weather conditions with mean seeing
of about 0.8 arcsec. The optical afterglow (Vetere et al. GCN 10317) is
clearly detected in enhanced XRT error
circle (Beardmore et al. GCN 10321). A photometry of combined image is based
on several SDSS DR7 field stars:
T0+ Filter Exp. Mag. UL
mid., days seconds (3 sigma)
0.8687 R 8*300 22.92 +/- 0.18 23.56
Comparing with R-magnitude reported by Xu et al. (GCN 10318) (R=19.46+/-0.05
in 0.05 days) one can obtain power-law decay index of about 1.12.