GCN Circular 15250
Subject
GRB 130925A: VLT/X-shooter redshift
Date
2013-09-25T11:07:01Z (11 years ago)
From
Sylvio Klose at TLS Tautenburg <klose@tls-tautenburg.de>
V. Sudilovsky, D.A. Kann, P. Schady (all MPE Garching), S. Klose (TLS
Tautenburg), J. Greiner (MPE Garching), and T. Kruehler (ESO) report:
We observed the optical/NIR afterglow (Sudilovsky et al., GCN 15247) of
GRB 130925A (Swift trigger 571830, Lien et al., GCN 15246) using ESO/VLT
UT2 equipped with the X-shooter spectrograph.
Observations started at 07:42 UT on 2013-09-25, about 3.5 hr after the
Swift trigger. A total exposure of 1.6 hr was obtained, covering the
spectral range from 3000 to 20500 AA.
In the spectrum we detect emission lines, which we interpret as being due
to [O II](3726,3729), H_beta, [O III](4959), [O III](5007) and H_alpha at
a common redshift of z = 0.35, in agreement with Vreeswijk et al. (GCN
15249).
We thank the Paranal staff for excellent support, in particular Linda
Schmidtobreick, Jonathan Smoker and Patricia.