TITLE: GCN CIRCULAR NUMBER: 7384 SUBJECT: GRB 080310: Magellan redshift DATE: 08/03/10 09:16:48 GMT FROM: Edo Berger at Princton U E. Berger (Carnegie/Princeton) and M. Rauch (Carnegie) report: "We obtained a spectrum of the optical afterglow of GRB 080310 (GCNs 7381, 7382) using the MagE spectrograph on the Magellan/Clay 6.5-m telescope. From preliminary analysis we determine a redshift of about 1.7 based on broad Ly-alpha absorption at ~3300A. Further observations and analysis are on-going."