TITLE: GCN CIRCULAR NUMBER: 6010 SUBJECT: GRB 070110: VLT absorption redshift DATE: 07/01/11 11:23:49 GMT FROM: Daniele Malesani at Niels Bohr Inst,Dark Cosmology Center A.O. Jaunsen (Univ. Oslo), D. Malesani, J.P.U. Fynbo, J. Sollerman (DARK/NBI), P.M. Vreeswijk (ESO), report on behalf of a larger collaboration. We observed the optical afterglow of GRB 070110 (Krimm et al., GCN 6005; Roming et al., GCN 6009) with the ESO VLT equipped with FORS2. Observations started on 2007 Jan 11.04 UT (17.6 hr after the GRB). Three 1800-s spectra were acquired in the range 3800-8500 AA. Based on the detection of a DLA and several metallic lines (among which SiII 1260, SiIV 1394,1403, CIV 1548,1551 and many others), we infer a redshift z = 2.352 +- 0.001. We also detect Lyalpha in emission superimposed on the DLA trough. We caution that the wavelength calibration has been performed using archival lamps. We acknowledge the excellent support from the ESO/Paranal staff.