TITLE: GCN CIRCULAR NUMBER: 23458 SUBJECT: GRB 181126A deep Gemini imaging DATE: 18/11/26 19:45:59 GMT FROM: Nial Tanvir at U.Leicester N. R. Tanvir (U. Leicester) and W. Fong (Northwestern Univ.) report on behalf of a larger collaboration: We observed the field of Swift GRB 181126A (Sonbas et al. GCN 23453) with the Gemini North telescope on Mauna Kea, beginning 2018-11-26 14:11 UT, approximately 4.3 hr post-burst. Images were obtained in the z filter using GMOS-N with total exposure of 15x60s. No credible afterglow is visible at the revised X-ray position (Beardmore et al. GCN 23455) to a 3-sigma magnitude z(AB)=25.4, uncorrected for Galactic extinction. We thank Mirko Simunovic and Christy Cunningham for efficiently executing these observations.