TITLE: GCN CIRCULAR NUMBER: 14385 SUBJECT: GRB130418A: OSN 1.5m fading afterglow detection DATE: 13/04/19 02:32:19 GMT FROM: Juan Carlos Tello at IAA-CSIC J.C. Tello, R. Sanchez-Ramirez (IAA-CSIC), J. Gorosabel (IAA/CSIC-UPV/EHU), F. Aceituno (OSN, IAA-CSIC) and A. Castro-Tirado (IAA-CSIC) on behalf of a larger collaboration report: We observed the field of GRB130418A reported by De Pasquale et al. (GCNC 14377) with the 1.5 meter telescope at the Sierra Nevada Observatory using an I band filter, where we clearly detect a fading source coincident with the UVOT afterglow position. Preliminary results of an image taken at 21h20m (2.33h after the burst) with a 300s exposure show the source presented a magnitude of I~17.13 when compared to the USNO-B1.0 catalogue. Another image taken at 22h45m (3.74h after the burst) with an exposure time of 60s shows a magnitude of I~17.51 (also preliminarily and when compared to the USNO-B1.0 catalogue). More images were taken and will continue to be taken when the source rises again above the local horizon.