TITLE: GCN CIRCULAR NUMBER: 14687 SUBJECT: GRB 130518A: Gemini Redshift confirmation DATE: 13/05/21 05:20:33 GMT FROM: Antonino Cucchiara at UCSC/UCO Lick A. Cucchiara (UCSC), S. B. Cenko (UC Berkeley) report on behalf of a larger collaboration: "We obtained spectroscopy of the afterglow of the LAT-GRB 130518A (Xiong et al. GCN 14674, Omodei et al. GCN 14675, Evans et al. GCN 14678) with Gemini-North / GMOS, beginning a May 20.60 UT roughly 2.05 days after the burst. Two different central wavelengths were observed giving a coverage from ~3850-6730 A. We identify several absorption features, including Lyman-alpha, SiIV(1394,1402), SiII1526, and CIV(1548,1550) at the common redshift of z=2.488. This result is consistent with the one reported by Sánchez-Ramírez et al. (GCN 14685). We thank the Gemini-staff for their help in performing these observations."