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TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2124 SUBJECT: GRB 030329: BVRI photometry at Asiago DATE: 03/04/09 19:50:40 GMT FROM: Daniele Malesani at SISSA-ISAS,Trieste,Italy <malesani@sissa.it> A. Simoncelli (INAF, Brera, I), D. Malesani (SISSA, Trieste, I), A. Della Valle (INAF, Padova, I), N. Masetti (IASF, Bologna, I), L.A. Antonelli (INAF, Roma, I), S. Covino (INAF, Brera, I), E. Pian (INAF, Trieste, I), on behalf of a larger Italian collaboration, report We have obtained BVRI images of the afterglow (Peterson & Price, GCN 1985) of GRB 030329 (Vanderspek et al., GCN 1997), using the 182cm Copernico telescope of the Astronomical Observatory of Padova (Italy), plus BFOSC. Seeing was ~3"; the afterglow was clearly detected in all bands; we measured for it the following BVRI magnitudes, with respect to the calibration performed by Henden (GCN 2082): UT start exptime filter mag err ------------------------------------------ Apr. 4.908 600 s R 18.14 +- 0.02 Apr. 4.916 1200 s B 18.88 +- 0.02 Apr. 4.932 600 s I 17.71 +- 0.02 Apr. 4.941 600 s V 18.55 +- 0.02 Assuming a powerlaw shape for the spectrum (F_nu propto nu^-beta), the best fit to our data yields beta~1. This message can be cited.
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