TITLE: GCN CIRCULAR NUMBER: 7615 SUBJECT: GRB 080413B: Gemini-South Spectroscopy DATE: 08/04/14 16:42:35 GMT FROM: Antonino Cucchiara at PSU A. Cucchiara and D. B. Fox (Penn State) with S. B. Cenko (Caltech), report on behalf of a larger collaboration: "Starting on 2008 April 13.41 UT we observed GRB 080413B (Stamatikos et al. GCN 7598) with the GMOS spectrograph on the Gemini South telescope. We obtained a single 900-sec spectrum in the wavelength range 3900-6700A. The resolution of our spectrum is 5 Ang/pixel (R ~ 1100 at 5900A). We clearly observe several metal absorption features corresponding to the MgII doublet (2796,2803 A), MgI (2853A), FeII (2586A and 2600A), and FeI (3021A). These identifications are consistent with a host galaxy redshift of z = 1.10, confirming the result reported from VLT observations by Vreeswijk et al.(GCN 7601)."