TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  2077
SUBJECT: GRB 030329,  BRI photometry
DATE:    03/04/03 00:39:01 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

M.A. Ibrahimov, I.M. Asfandiyarov, B.B. Kahharov (Ulugh Beg Astronomical
Institute of Uzbekistam Academy of Science), A.Pozanenko (IKI), V.Rumyantsev
(on behalf of CrAO GRB team), G.Beskin (SAO) report:


We have observed the OT found by Peterson and Price  (GCN 1985) of GRB030329
with  1.5m telescope of  High-altitude Observatory at Mt.Maidanak.  The
telescope is equipped   with  CCD SITe (2000x800). The observations were
carried out under good seeing conditions (1".0). Several BRI Bessel images
were obtained in April, 1. Based on star filed photometry by A. Henden (GCN
2023)  we estimate the OT magnitude:

UT, Apr 1 filter  exposure  mag       err

18:42:24  R       300        17.082   0.021
18:48:06  R       300        17.036   0.025
18:53:48  B       600        17.707   0.072
19:04:35  R       300        16.977   0.044
19:10:09  R       600        17.016   0.027
19:20:52  I        600        16.625   0.047
19:31:41  R       600        17.045   0.047
19:44:55  R       600        17.010   0.033
19:56:01  B       600        17.766   0.031
20:14:49  B       300        17.777   0.013
20:20:28  R       300        17.022   0.011
20:26:26  I        300        16.520   0.013
20:32:10  B       300        17.799   0.015
20:37:58  R       300        17.030   0.011
20:43:39  I        300        16.531   0.013
20:52:03  B       600        17.741   0.029
21:02:42  R       300        17.006   0.023

The estimation is preliminary and may be improved.

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