TITLE: GCN CIRCULAR NUMBER: 11518 SUBJECT: GRB 101219A: Gemini-North host redshift DATE: 11/01/04 16:34:27 GMT FROM: Ryan Chornock at Harvard R. Chornock and E. Berger (Harvard) report on behalf of a larger collaboration: We obtained 4x1800s of spectroscopy of the host galaxy candidate (Perley et al., GCN 11464; Cenko et al., GCN 11468; Chornock et al., GCN 11469) found in the XRT error circle of the short-hard GRB 101219A (Gelbord et al., GCN 11461) using GMOS on Gemini-North starting on January 2.25 UT. Observations were obtained with the R400 grating, covering 5890-10100 Angstroms in nod-and-shuffle mode. The galaxy spectrum exhibits emission lines due to [O II] 3727 Angs and [O III] 5007 Angs at a redshift of 0.718.