GCN Circular 7890
Subject
GRB 080603b: optical observation
Event
Date
2008-06-21T11:40:18Z (17 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Klunko (ISTP), A. Pozanenko (IKI) on behalf of larger GRB follow up
collaboration report:
We observed afterglow (Rujopakarn, et al., GCN 7792) of Swift GRB 0800603b
(Mangano et al., GCN 7794) with 1.5 m telescope of Sayan observatory
(Mondy) on Jun.04 between (UT) 18:35 - 19:11. The afterglow is detected in a
combined image of 8x120 s exposure. A photometry of the afterglow obtained
against several USNO-A2.0 stars is following:
T0+ Exposure R_mag
(mid)
0.9686 d 8x120 s 21.10 +/- 0.10
This photometry confirms the steep decay of a light curve (alpha ~ 2.5)
suggested by Kann et al. (GCN 7824).
The message may be cited.