TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3483 SUBJECT: GRB 050525a: Gemini/GMOS Spectra DATE: 05/05/25 21:04:19 GMT FROM: Josh Bloom at Harvard/CFA R. J. Foley (UCB), H.-W. Chen (MIT), J. Bloom (UCB), J. X. Prochaska (UCSC) report: "We obtained a 5x1800 sec dithered exposures of the optical candidate (GCN 3465) of GRB 050525 with GMOS on the Gemini-North telescope starting at 2005 May 25.43 UT. We measure a redshift of z = 0.606, which we assume to be the redshift of the host galaxy, based on [O III] 5007 and H beta emission and Ca H&K and Ca I 4228 absorption. There is perhaps very faint [O II] emission. Further analysis is underway. This notice may be cited."