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.

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