TITLE: GCN CIRCULAR NUMBER: 13981 SUBJECT: GRB 121108A: optical upper limit DATE: 12/11/21 17:12:37 GMT FROM: Alexei Pozanenko at IKI, Moscow V. Rumyantsev, N.Pit' (CrAO), А. Volnova (SAI MSU, IKI), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of the Swift GRB 121108A (Ukwatta et al., GCN 13952) with AZT-11 telescope of CrAO observatory starting on Nov. 08 (UT) 18:07:04. We took several images in R-filter of 180 s exposure. Within enhanced XRT afterglow position (Beardmore et al., GCN 13959) we do not detect any new object. A photometry of co-added frame is based on the USNO-B1.0 (R2) nearby stars is following: T0+, Filter Exposure, OT, UL (3 sigma) mid, d (s) 0.02395 R 10x180 n/d 18.9