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TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2035 SUBJECT: GRB030329: R band light curve by MASTER DATE: 03/03/30 23:43:37 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <gcncirc@observ.inetcomm.ru> V. Lipunov, A. Krylov, V. Kornilov, G. Borisov, D. Kuvshinov, A. Belinski, I. Chilingarian, M. Kuznetsov, S. Potanin, V. Vitrischak, G. Antipov Sternberg Astronomical Institute, Alexsandr Krylov Observatory, Moscow report: The OT of GRB030329 (Peterson and Price, GCN 1985) was observed with MASTER system (280mm, http://observ.pereplet.ru, GCN 2002). We obtained about 200 measurements in R filter, with calibration to several tens of USNO A2.0 stars located in 15 arcmin field around the OT. Our observations started at Mar 29, 17.1 UT (5.5 hours after the GRB) and had been lasting for 8.5 hours up to Mar 30, 1.5 UT (13.9 hours after the GRB). Corresponding to our observations, R-band flux declines as t^-1.0 (sligtly differs from t^-1.1 reported by Burenin et al. GCN 2024). At the end of observations the OT's brightness began to decrease more rapidly. We had very poor transparancy at that time, so flux measurements uncertanities were quite big, therefore we can't confirm or refute -1.9 index reported by Garnavich et al. (GCN 2018). Our lightcurve based on 114 measurements available at: http://observ.pereplet.ru/images/GRB030329_R_lc.gif http://www.sai.msu.su/~chil/GRB030329_R_lc.ps Further analysis of the obtained data is underway. This message may be cited.
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