TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1991 SUBJECT: GRB 030328: Optical observations DATE: 03/03/29 15:31:57 GMT FROM: Vasilij Rumjantsev at CrAO V.Rumyantsev (CrAO), V.Biryukov(SAI) and A.Pozanenko (IKI) report: We have obtained 44 unfiltered exposures (120-s each) of the GRB 030228 error box (HETE Trigger #2650). The images were taken with the AT-64 telescope of Crimean Astrophysical observatory and cover the period (UT) 18:46 - 23:07 March 28, 2003. We used CCD SBIG ST-8 with maximum of sensitivity in the red spectral band. In a co-added image the OT is visible at the position of reported by B.A. Peterson and P.A. Price (GCN 1974). The brightness was estimated in respect to the star B (GCN 1982) as R = 20.9 +/- 0.2. Start time exposure OT March 28 18:46 44x120 s 20.9 +- 0.2 Detailed calibration is underway. The image is available at http://grb.rssi.ru/GRB030228 This message can be cited.