TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  2122
SUBJECT: GRB 030329: VLT V-band photometry
DATE:    03/04/09 11:49:15 GMT
FROM:    Daniele Malesani at SISSA-ISAS,Trieste,Italy  <malesani@sissa.it>

S. Covino, G. Ghisellini (INAF, Brera, I); D. Malesani (SISSA, Ts, I);
P.A. Price (Caltech, USA); D. Lazzati, E.M. Rossi (IoA, Cambridge, UK);
G. Chincarini, G. Tagliaferri, F.M. Zerbi (INAF, Brera, I); S. Di
Serego, M. Della Valle, A. Cimatti (INAF, Arcetri, I); F. Fiore, G.L.
Israel, L. Stella (INAF, Roma, I); M. Vietri (Roma 3, Univ, I); N. Kawai
(RICHEN, Japan); G.R. Ricker (MIT, USA); E. Le Floc'h, P. Goldoni, I.F.
Mirabel (CEA, Sacley, F); S. Mereghetti (IASF, Mi, I); E. Costa, P.
Soffitta (IASF, Roma, I); S. Ortolani (Padova Univ., Italy); A. Kaufer,
A. Lopez, P.M. Vreeswijk, P. Vaisanen, A.O. Jaunsen (ESO);

report:

Starting on 2003 April 2.1, we observed the optical counterpart
(Peterson & Price, GCN 1985; Torii, GCN 1986) of GRB 030329 (Vanderspek
et al., GCN 1997). The observations were performed with the ESO VLT-UT1
(Antu) telescope equipped with FORS1, in spectropolarimetric mode.
Several acquisition images were taken, under photometric sky conditions;
here we report the V-band magnitudes of the OT, based on Henden's
calibration (GCN 2023). Seeing was ~1".


UT         t-t0 (days)  V mag     err
---------------------------------------
Apr 2.089  2.605        17.652 +- 0.015
Apr 2.128  2.644        17.696 +- 0.014
Apr 2.166  2.682        17.738 +- 0.015


The complete analysis of the spectropolarimetric dataset is underway.

We thank the ESO staff at Paranal for their kind and reliable
assistance.

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