Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

GCN Circular 3948

GRB 050908: spectroscopic redshift
2005-09-08T09:30:59Z (19 years ago)
Daniele Malesani at SISSA-ISAS,Trieste,Italy <>
D. Fugazza (INAF/OABr), F. Fiore (INAF/OARm), F. Patat, C. Ledoux (ESO), 
P. D'Avanzo (INAF/OABr), L.A. Antonelli (INAF/OARm), G. Chincarini 
(INAF/OABr & Univ. Milano-Bicocca), D. Malesani (SISSA/ISAS), S. Covino, 
G. Tagliaferri (INAF/OABr), S. Piranomonte and L. Stella (INAF/OArm), 
report on behalf of the MISTICI collaboration:

We observed the optical afterglow (Torii, GCN 3943; Cenko, Fox & Berger, 
GCN 3944) of GRB 050908 (Goad et al., GCNs 3942, 3946) with the ESO-VLT 
UT2, equipped with the FORS1 instrument. Spectroscopy was performed with 
the grism 300V, covering the wavelength range 4500-8500 AA. Twenty 
minutes of exposure were acquired starting on 2005 Sep 8, 07:19 UT. Data 
reduction was performed using archivial calibration files, so that small 
systematic uncertainties may be present in our analysis.

Based on the detection of Lyalpha, SiIV1309,1402, CIV1548,1550, 
SiII1206, and the Lyman limit, we measure a redshift z = 3.350 +- 0.005.

Further analysis is in progress and results will be communicated later.

We acknowledge the outstanding support received from the ESO staff.

This message can be cited.

[GCN OPS NOTE(10sep05): Per author's request, "N. Patat" was changed to "F. Patat".]
Looking for U.S. government information and services? Visit