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 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.