TITLE: GCN CIRCULAR NUMBER: 12736 SUBJECT: GRB 111205A: optical observations DATE: 11/12/28 09:04:33 GMT FROM: Alexei Pozanenko at IKI, Moscow L. Elenin (KIAM), A. Volnova (SAI MSU), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of IPN of hard intense GRB 111205A (Hurley et al., GCN 12626; Golenetskii et al., GCN 12627) with 0.45-m telescope If ISON-NM observatory on Dec 8 (09:55:52 - 11:52:34 UT). We took several unfiltered images of 300 s exposure. All our images cover full IPN error box. On a stacked image we do not find any new objects within IPN error box in comparison with DSS. We detect DSS source mentioned by Wolf & Hoversten in the XRT error circle (Wolf & Hoversten, GCN 12630). However due to bad seeing we cannot resolve this source into separate sources of a double star (Kann et al., GCN 12636). Photometry of the unresolved source based on several nearby USNO-B1.0 stars (R2 magnitudes) is the following: t-t0 filter Exp. source uplim (3 sigma) (mid, days) (s) 2.90513 none 21x300 15.40 +/- 0.05 19.8