Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to https://gcn.nasa.gov.
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 14493

Subject
GRB 130427B: Tentative VLT/X-shooter redshift
Date
2013-04-28T18:13:02Z (11 years ago)
From
Dong Xu at DARK/NBI <dong.dark@gmail.com>
H. Flores (GEPI/Obs. de Paris),  S. Covino (INAF),  A. de Ugarte
Postigo (IAA-CSIC, DARK/NBI), J. Fynbo, T. Kruehler, D. Xu (DARK/NBI)
and N. Tanvir (U. Leicester)  report on behalf of the X-Shooter GRB
collaboration:

We have observed the afterglow of the GRB 130427B (Maselli et al., GCN
14460) with the ESO VLT equipped with the X-shooter spectrograph. The
observation started on  2013-04-28 at 9:45 UT. A total exposure of
2x600 s was obtained just before morning twilight, covering the
spectral range from 300 to 2500 nm.

In the spectrum we detect a  feature consistent with a damped
Lyman-alpha line in the UVB arm at redshift of z=2.78 +/-  0.02. Given
the low S/N of the spectrum, this redshift measurement should be
considered tentative.

We thank the Paranal staff for enthusiastic support, in particular
Andrea Mehner and Christophe Martayan.
Looking for U.S. government information and services? Visit USA.gov