TITLE: GCN CIRCULAR NUMBER: 9156 SUBJECT: GRB 090417B: Galaxy redshift DATE: 09/04/18 17:49:52 GMT FROM: Edo Berger at Harvard E. Berger (Harvard) and D.B. Fox (PSU) report: "We obtained spectroscopic observations of the SDSS galaxy located inside the XRT error circle of GRB 090417B (GCNs 9153, 9155, 9140) with GMOS on the Gemini-North telescope. In a combined 1800 sec spectrum we detect emission lines corresponding to [OII]3727, [OIII]5006, and H-alpha at a redshift of z=0.345. At this redshift the observed fluence of the burst (2.3e-6 erg/cm^2; GCN 9139) translates to an isotropic-equivalent energy of 9e50 erg."