[vsnet-grb-info 6265] GRB 080603b: optical observation
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Sat Jun 21 20:40:23 JST 2008
TITLE: GCN CIRCULAR
NUMBER: 7890
SUBJECT: GRB 080603b: optical observation
DATE: 08/06/21 11:40:18 GMT
FROM: Alexei Pozanenko at IKI, Moscow <apozanen at 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.
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