GCN Circular 10422
A. Cucchiara (PSU), R. Chornock (Harvard),D. B. Fox (PSU), E. Berger (Harvard), report on behalf of a larger collaboration: "We observed the field of GRB 100213B (Vetere et al., GCN 10412) with GMOS on the Gemini-North 8-m telescope starting on 2010 Feb 14.24 (~7 hours after the burst). Inside the refined XRT error circle (GCN #10416) we detect no new sources in a 2 min r-band acquisition image. Outside the XRT error circle we clearly detect the source reported by Malesani et al. (GCN #10413). We then obtain 2x1200s spectra on this source at central wavelength 8000A. We detect [OII]3727, H-beta and [OIII]5007 at the common redshift of z =0.604. At this point is not clear whether this object is related to GRB 100213B. We thank the Gemini staff for performing this observation, in particular Tom Geballe."