[vsnet-grb-info 16138] GRB 150206A: VLT/X-shooter redshift

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  17420
SUBJECT: GRB 150206A: VLT/X-shooter redshift
DATE:    15/02/07 03:55:50 GMT
FROM:    Dong Xu at DARK/NBI  <dong.dark at gmail.com>

T. Kruehler (ESO Chile), D. Xu, J. P. U. Fynbo, D. Malesani
(DARK/NBI),  Z. Cano (U. Iceland), A. de Ugarte Postigo (IAA-CSIC,
DARK/NBI)
report on behalf of a larger collaboration:

We observed the afterglow of GRB 150206A (Hagen et al. GCN 17413) with
the VLT/X-shooter spectrograph, equipped with the UVB/VIS/NIR arms and
covering the wavelength range 3000-25000 AA. In a 4x600 s spectrum we
detect absorption features of ZnII, FeII, and MgII at a common
redshift of z=2.087. The spectral trace is down to ~3760 AA, being
consistent with a Lya feature at the same redshift. We thus think this
is the redshift of the GRB.

We acknowledge excellent support from the observing staff at Paranal,
in particular Dimitri Gadotti.