GCN Circular 10624
A. Cucchiara and D. B. Fox (PSU) report on behalf of a larger collaboration: "Starting on 2010 April 19.41 UT we used the GMOS spectrograph on the Gemini North 8-m telescope to observe the field of the Swift GRB 100418A (Marshall et al. GCN 10612). A sequence of 2x1200s spectra were obtained covering the spectral range of 4000-8000A. A series of metal absorption features were identified (MgII2796, 2803,FeI3720, Ca H&K, CaI4227) and H-beta in emission at the common redshift of z= 0.624, confirming the previously reported result of Antonelli et al. GCN 10620. We thank the Gemini staff for performing this observation, in particular A. Fritz."