GCN Circular 11638
S. B. Cenko (UC Berkeley), J. L. Hora (CfA), and J. S. Bloom (UC Berkeley) report on behalf of a larger collaboration: We obtained a pair of spectra of the optical afterglow of GRB 110205A (Beardmore et al., GCN 11629) with the FAST spectrograph mounted on the FLWO 1.5 m telescope. Observations began at 6:27 UT (~ 4.5 hours after the burst) and cover the wavelength range from 3500-7400 A. As reported by da Silva et al (GCN 11635), the spectrum exhibits a prominent DLA absorption feature; however, we observe this feature at a slightly larger wavelength (~ 3900 A). We further identify a series of narrow absorption features, including Si II, Si II*, C IV, and Al II, at a common redshift of z=2.22. The detection of Si II*, together with the DLA system, strongly suggest this is the host galaxy of GRB 110205A.