GCN Circular 5946
S. B. Cenko, M. Kasliwal, P. B. Cameron, S. R. Kulkarni (Caltech) and D. B. Fox (Penn State) report on behalf of a larger collaboration: We have obtained a spectrum of the possible host galaxy S2-G2 (Berger, GCN 5922) of the short-hard GRB061210 (Cannizzo et al., GCN 5904). S2-G2 is an r=21 galaxy with a bulge-dominated morphology on the outskirts of the possible XRT afterglow S2 (Godet et al., GCN 5921). Using the Low-Resolution Imaging Spectrometer mounted on the 10-m Keck I telescope, we obtained 2 x 30 min spectra of this galaxy at a mean epoch of ~ 13:30 Dec 19 UT. We measure a redshift of z = 0.41 based on emission lines of [OII], [OIII], and HI. With a 15-150 keV fluence of 1.1e-6 erg/cm^2 (Palmer et al., GCN 5905), this corresponds to an isotropic prompt energy release of 4.6e50 ergs.