GCN Circular 3939
Subject
GRB050904: CrAO optical observations
Event
Date
2005-09-07T21:38:18Z (21 years ago)
From
Vasilij Rumjantsev at CrAO <rum@crao.crimea.ua>
V.Rumyantsev (CrAO), V.Biryukov (SAI, MSU), A.Pozanenko
(IKI), M. Ibrahimov (MAO) on behalf of larger GRB follow up
collaboration report:
We observed the BAT and XRT error boxes of GRB050904
(Swift # 153514; Cummings et al., GCN 3910) with 2.6m Shain
telescope (CrAO) on September 4 between (UT) 20:39 - 21:31
in R-band filter. The OT (Haislip et al., GCN 3913, D'Avanzo
et al. GCN 3921) is not detected in our combine image.
Preliminary estimation of the limiting value of the
combined image based on USNO-A2.0 catalog is following
Mean time Exposure Filter Magnitude
(UT) s
21:04 24x120 R 23.5
Combined image can be found in http://grb.rssi.ru/GRB050904.
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