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TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1983 SUBJECT: GRB030328: optical spectroscopy at TNG DATE: 03/03/29 12:07:20 GMT FROM: Angelo Antonelli at Obs. Astro. di Roma <angelo@coma.mporzio.astro.it> D. Fugazza (TNG), F. Fiore, M. Cocchia, L.A. Antonelli (INAF-OAR), S. Covino (INAF-OAB), E. Pian (INAF-OATs), N. Masetti (CNR-IASF), A. Buzzoni, G. Tessicini (TNG), on behalf of a larger collaboration, report: "Starting on March 29 2002 00:28 UT we have obtained low resolution (R~1000) spectra of the optical afterglow of GRB030328 (Peterson & Price GCN #1974) using DOLORES at TNG. Observations consisted of four exposures, for a total of 2 hours, and cover the full spectral range 3800-8000 Angstrom, in good seeing conditions (between 1" and 1.5"). At the time of the observations the afterglow magnitude was R~20.7 (Fugazza et al. GCN #1982). A preliminary analysis of the spectra reveals several absorption lines associated with the z=1.52 system reported by Martini et al. (GCN #1980), in particular MgII2803, MgII2796, FeII2600 and FeII2382. Other narrow absorption lines are present in the spectra, but a more detailed analysis is needed to their identification. We are particularly grateful to the TNG staff for their remarkable support to these observations." This message is citeable.
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