TITLE: GCN CIRCULAR NUMBER: 12202 SUBJECT: GRB110726A: Gemini-N tentative redshift DATE: 11/07/26 17:19:31 GMT FROM: Antonino Cucchiara at LBNL A. Cucchiara (UC Santa Cruz), J. S. Bloom and S. B. Cenko (UC Berkeley) report on behalf of a larger collaboration: "We observed the field of GRB 110726A at 06:14 UT (~0.19 days after the burst) with the GMOS camera mounted on the Gemini-North telescope. We obtained a sequence of 2x900 seconds spectra centered at 6000 Angstrom and covering 4000-8100A wavelength range. The object is well detected and present a featureless continuum except for a weak double line which we interpret as a signature of MgII 2796,2803 at redshift z = 1.036. No other clear features are detected. Therefore, we suggest 1.036 < z < 2.7 as redshift range for GRB 110726A. We thank the Gemini-N staff for performing this observation, in particular J. Holt."