TITLE: GCN CIRCULAR NUMBER: 12481 SUBJECT: GRB 111022B: Gemini infrared observations DATE: 11/10/23 13:19:30 GMT FROM: Andrew Levan at U.of Leicester A.J. Levan (U. Warwick), D. Fox (PSU), N.R. Tanvir (U. Leicester) report for a larger collaboration: "We observed the localization of GRB 111022B (Holland et al. GCN 12472) with the Gemini-North telescope, equipped with NIRI. Observations were obtained in poor conditions (2.5" seeing) and began 17 hours after the burst in the YJHK filters. We find a single source within the refined XRT error circle (Beardmore et al. GCN 12478). The source is well detected in both H and K, with K~19.0 +/- 0.2, but only very weakly in J. Given the earlier non-detections in the optical (Vreeswijk et al. GCN 12479) the inferred optical-IR colour is red (R-K > 4.2), coupled with the lack of apparent excess N_H this could be indicative of a high redshift burst. Analysis is ongoing, and further observations are planned."