GCN Circular 2775
Subject
GRB041006, optical observation
Date
2004-10-07T00:17:13Z (20 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
B. Kahharov, I. Asfandiyarov, M. Ibrahimov, D. Sharapov (UBAI),
A.Pozanenko (IKI),
V.Rumyantsev (CrAO), G.Beskin (SAO) report:
We have observed the filed of error box of GRB041006 (HETE #3570, M.
Galassi, et al. GCN 2770) starting Oct.6 15:49 (UT) with 1.5m telescope of
Mt.Maidanak High-altitude Observatory. Several BVRI images were taken
between 15:49 and 16:51. We confirm a fading source found by G. Da Costa et
al. (GCN 2765). Preliminary reduction of the data against the USNO-A2.0
catalog yield the following OT magnitudes in R
UT exposure mag err
15:49 180 s 18.7 (0.09)
16:46 300 s 19.1 (0.10)
The magnitudes assume a temporal decay index about 1.5 which is stepper than
found by P.A. Price, et al. (GCN 2771) and may indicate a brake of a light
curve of the OT.
This message may be cited.