TITLE: GCN CIRCULAR NUMBER: 6379 SUBJECT: GRB 070506: VLT redshift DATE: 07/05/07 11:03:32 GMT FROM: Christina Thoene at Niels Bohr Institute,DARK Cosmo Ctr Christina C. Thoene (DARK), Andreas O. Jaunsen (Univ. Oslo), Johan P. U. Fynbo (DARK), Pall Jakobsson (Univ. of Hertfordshire) and Paul M. Vreeswijk (ESO) report: We obtained 2x15min spectra of the OT of GRB 070506 (Pagani et al., GCN 6375 and 6378) on May 6.41 with FORS1/VLT during twilight. The grism used (300V) covers the wavelength range from 3000 to 9000 A. The identification of a strong Lyman-alpha absorption together with SiII, FeII, CIV, AlII, AlIII and ZnII absorption lines leads to a redshift of z=2.31 for GRB 070506. We thank the staff at Paranal for excellent support.