TITLE: GCN CIRCULAR NUMBER: 6101 SUBJECT: GRB 070209: Redshift of a galaxy in the error circle of XRT source DATE: 07/02/13 07:20:20 GMT FROM: Edo Berger at Carnegie Obs E. Berger (Carnegie Observatories) and D. Fox (Penn State) report on behalf of a larger collaboration: "Using GMOS on the Gemini-south telescope we obtained a 2400 spectrum of an apparent galaxy located within the error circle of XRT source #1 (GCN 6095). This is the only X-ray source which exhibits signs of fading and is the nearest to the BAT error circle of this burst (GCN 6087). We find that the redshift of the galaxy is z=0.314 based on the detection of CaII H&K, as well as [OII] and [OIII] emission lines. At this redshift, the isotropic-equivalent energy of the burst is 2.6e48 erg."