GCN Circular 1203
Subject
GRB 011211: TNG Spectroscopic Observations
Date
2001-12-14T18:45:21Z (23 years ago)
From
Angelo Antonelli at Obs. Astro. di Roma <angelo@coma.mporzio.astro.it>
F. Fiore, G.L. Israel, L.A. Antonelli, L. Stella (OA Roma), S. Covino,
P. Saracco, G. Ghisellini (OA Brera), A. Buzzoni, T. Oliva (TNG),
E. Pian (OA Trieste), E. Palazzi, N. Masetti (ITeSRe, CNR, Bologna)
on behalf of a larger collaboration, report:
"Spectra of the OT (Grav et al.: GCN #1191) of GRB011211 in the
350-750nm range (total exposure time of about 1hr) were obtained with
the 3.5m Telescopio Nazionale Galileo (TNG) equipped with DOLORES +
grism #1 on Dec. 13.27 (UT). The source was relatively faint, V~21.7,
and the signal to noise of our spectra does not allow the detection
of faint absorption lines. The continuum is peaked in the blue band,
and consistent with the V-R of 0.2 measured by Soszynski et al.
(GCN #1199) at the time of the TNG observation. A break is evident
shortward of about 400nm which may be interpreted as Lyman-alpha
forest blanketing at a redshift of about z=2.1, consistent with
that reported by Fruchter et al. (GCN #1200).
Further analysis is in progress.
This message may be cited."