{
  "bibcode": "2003GCN..2015....1D",
  "body": "R. Della Ceca, T. Maccacaro (INAF-OABrera), D. Fugazza, M. Pedani,\nM. Cecconi (TNG), F. Fiore, L.A. Antonelli (INAF-OAR), S. Covino\n(INAF-OABrera), E. Pian (INAF-OATs), N. Masetti (IASF-CNR) report:\n \n\"Starting on March 30 2003 00:43:40 UT we have obtained low resolution\n(R~1000) spectra of the optical afterglow of GRB030329 (Peterson &\nPrice GCN #1985, Torii, GCN #1986) using DOLORES at TNG.  Observations\nconsisted of two exposures of 15 min each the second obtained at 2.75hh \nafter the first, and cover  the full spectral range 3800-8000 Angstrom, \nin relatively good seeing conditions (1.5\").  At the time of the \nobservations the afterglow magnitude was R~15-16 (e.g. Martini et al.\nGCN #2012).\n \nA preliminary analysis of the spectra reveals no strong absorption\nfeatures. A more detailed analysis is needed to search for faint\nabsorption lines.  A faint emission line at 5846 Angstrom (see Martini\net al. GCN# 2013) is present in the later spectra, when the afterglow\nemission was less strong. If this is [OII] emission from the host\ngalaxy, then the redshift is z=0.568.\n\nWe detect a strong spectral variability between the first spectrum, \nwhen the afterglow was extremely blue, and the second spectrum, \nobtained starting from 03:25:35 UT.\n \nWe are particularly grateful to the TNG staff for their remarkable\nsupport to these observations.\n\nThis message may be cited.\"",
  "circularId": 2015,
  "createdOn": 1049003768000,
  "email": "angelo@coma.mporzio.astro.it",
  "subject": "GRB030329: optical spectroscopy with the TNG",
  "submitter": "Angelo Antonelli at Obs. Astro. di Roma  <angelo@coma.mporzio.astro.it>",
  "eventId": "GRB 030329"
}