TITLE: GCN CIRCULAR NUMBER: 14380 SUBJECT: GRB 130418A: Redshift from 10.4m GTC DATE: 13/04/18 22:49:12 GMT FROM: Antonio de Ugarte Postigo at IAA-CSIC A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), C.C. Thoene (IAA-CSIC), J. Gorosabel (UPV/EHU, IAA-CSIC), R. Sanchez-Ramirez (IAA-CSIC), J. P. U. Fynbo (DARK/NBI), N. Tanvir (U. Leicester) and C.A. Alvarez Iglesias (IAC-ULL) report: We have observed the afterglow of GRB 130418A (De Pasquale et al. GCN 14377) with the 10.4m GTC telescope starting at 21:45 UT (2.75 hr after the burst). Observations consisted of 2x600s using the R1000B grating, with a resolution of R~1000 in the range 3600 - 7900 A. The spectrum shows a high S/N trace, with very weak MgII features at a redshift of z = 1.218, which we identify as the redshift of the GRB. [GCN OPS NOTE(19apr13): Per author's request, CAAI's affiliation was changed from GTC to IAC-ULL.]