TITLE: GCN CIRCULAR NUMBER: 12708 SUBJECT: GRB 111103B: optical upper limit DATE: 11/12/20 13:00:59 GMT FROM: Alina Volnova at SAI MSU V. Rumyantsev (CrAO), V. Biryukov (SAI MSU, CrAO), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed field of the Swift GRB 111103B (Grupe et al. GCN 12519) with Zeiss-600 telescope of Crimean branch of SAI MSU in R filter between Nov. 3 (UT) 15:44:07 - 17:02:29. We took 73 images of 60 exposure under bad weather conditions and mean seeing (FWHW) of about 3.4". We do not detect any source within enhanced XRT position (Goad et al., GCN 12525). A photometry is based on the USNO B1.0 star 0916-0323572 (RA = 17:42:46.95, Dec = +01:36:05.2, J2000) assuming R = 15.67. T0+ Filter, Exposure, OT, UpperLimit (mid, d) (s) 0.22517 R 73x60 n/d 20.4