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GCN Circular 2366

Subject
GRB030823: optical observations
Date
2003-08-25T19:53:38Z (21 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
M.A. Ibrahimov, I.M. Asfandiyarov, B.B. Kahharov (UBAI), A.Pozanenko (IKI),
V.Rumyantsev, E.Pavlenko, O. Antoniuk (CrAO),  G.Beskin (SAO) report:

We have observed the entire SXC error box of  GRB030823 (HETE trigger 2818)
with different instruments. The observations started at 15:46 UT (6.9h after
burst) with 1.5m telescope of Maidanak High-altitude Observatory (UBAI).
Two sets of images (##1,2 in a table below) covering entire  SXC error box
at different epochs were taken with 1.5m telescope. Visual comparison of
images at two different epochs reveals no bright variable source.
Observations at Crimean Astrophysical Observatory were carried out with
AT-64 and K-380 telescopes. Visual comparison of all images with DSS2
reveals no new sources down to limiting magnitude indicated in the table.

#    Mid. Time  Telescope     Exposure  Limiting
     (UT)                               magnitude
                                        (R)
1    23.6651    1.5m (UBAI)   300s      19.5
2    23.7805    1.5m (UBAI)   300s      20.5
3    23.7826    AT-64 (CrAO)  7x180s    20.5
4    23.8131    K-380 (CrAO)  6x300s    19.0
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