TITLE: GCN CIRCULAR NUMBER: 12486 SUBJECT: GRB 111016A: optical upper limit DATE: 11/10/23 19:32:31 GMT FROM: Alexei Pozanenko at IKI, Moscow A. Volnova (SAI MSU), E. Litvinenko (UBAI), I. Molotov (KIAM), A. Pozanenko (IKI) on behalf of larger GRB follow up collaboration report: We observed the field of the Swift GRB 111016A (Mangano et al., GCN 12439) with 40-cm telescope ORI-40 of Kitab ISON observatory on Oct. 16 starting on (UT) 22:07:26. On the stacked image we do not detect any source within the enhanced XRT error box (Evans et al., GCN 12441). The photometry is based on the reference star SDSS 101516.54+272642.0 assuming (after recalibration gri->R) R=17.77: Tstart UT, T0+, Filter, Exposure, OT, UL (3 sigma) (mid, d) (s) 22:07:26 0.15905 none 36*60 n/d 19.2