GCN Circular 8438
Subject
GRB 081029: UVES/VLT Absorption Redshift
Date
2008-10-29T06:08:18Z (16 years ago)
From
Paolo D'Avanzo at INAF-OAB <paolo.davanzo@brera.inaf.it>
V. D'Elia, (INAF-OAR), S. Covino, P. D'Avanzo (INAF-OAB), report on
behalf of
the MISTICI collaboration
Following the detection of GRB 081029 (Sakamoto et al. GCN 8435), we
triggered observations with the UVES camera, mounted at ESO-VLT. The
observations were performed using both dichroics. We took two spectra
starting around Oct 29 at 02:06 UT (about 23 minutes after the burst)
and covering the range 300-1000 nm.
We detect several absorption features, both ground and fine structure,
namely, the SiII 1253, SiII 1260, SiII* 1264, OI 1302, SiII 1304, SiII*
1309, CII 1334 and CII* 1335. These features are interpreted as produced
by the gas in the GRB host galaxy, at the redshift z=3.8479+/-0.0002
Further analysis is in progress.
We are very grateful for the excellent support of the VLT staff and in
particular to Antonio De Ugarte Postigo.