TITLE:   GCN CIRCULAR
NUMBER:  3174
SUBJECT: GRB050401: Maidanak optical observation
DATE:    05/04/02 22:10:22 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

B. Kahharov, M. Ibrahimov,  D. Sharapov (MAO), A.Pozanenko (IKI),
V.Rumyantsev (CrAO),  G.Beskin (SAO) report:



We observed the afterglow   (McNaught and Price, GCN 3163; Rykoff et al.,
GCN 3165) of the Swift  GRB050401 (Angelini et al., GCN 3161; Barbier et
al., GCN 3162) with 1.5m telescope of  Maidanak Astronomical Observatory
(MAO), Uzbekistan under good weather conditions (seeing is 1.0 arcsec).
Preliminary R-photometry against of USNO-B1.0 Catalog is following:



Mean time    Exposure    Mag.

(UT)          (s)



Apr. 1.988   8x300       22.2 +/- 0.2





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