TITLE: GCN CIRCULAR NUMBER: 17067 SUBJECT: GRB 141109B: optical upper limits DATE: 14/11/13 00:53:15 GMT FROM: Alexei Pozanenko at IKI, Moscow E. Mazaeva (IKI), A. Stepura (UAFO, ISON), R. Inasaridze (AAO), B. Abdulloev (Institute of Astrophysics), A. Matkin (UAFO, ISON), N. Minikulov (Institute of Astrophysics), A. Volnova (IKI), Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of the Swift GRB 141109B (Melandri et al., GCN 17038) with following instruments: SANTEL-650 (0.65m) telescope of UAFO/ISON-Ussuriysk Observatory, AZT-8 (0.7m) telescope of Gissar observatory, and AS-32 (0.7m) telescope of Abastumani Observatory (AAO). In the enhanced XRT error circle (Beardmore et al., GCN 17045) we do not detect any source with upper limits listed below: Date UT start t-T0 Filter Exp. UL(3sigma) Observatory (mid, days) (s) 2014-11-09 09:18:51 0.10220 clear 100*60 20.7 UAFO 2014-11-09 14:30:43 0.29425 R 40*60 19.9 Gissar 2014-11-09 15:26:30 0.38464 clear 71*120 22.0 AAO The photometry is based on stars of USNO-B1.0 and assumed R magnitudes: RA DEC R 222.429145 +73.085200 14.97 222.517839 +73.110348 15.54 222.193512 +73.123517 17.06 222.275356 +73.104562 17.46 222.463681 +73.158509 17.55