TITLE: GCN CIRCULAR NUMBER: 16947 SUBJECT: GRB 141020A: Khureltogot optical upper limit DATE: 14/10/25 00:46:27 GMT FROM: Alexei Pozanenko at IKI E. Mazaeva (IKI), S. Schmalz (AIP), N. Tungalag (Research Center of Astronomy and Geophysics MAS), A. Volnova (IKI), I.Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of the Swift GRB 141020A (Cenko et al., GCN 16928) with ORI-40 telescope of Khureltogot observatory. We obtained several unfiltered images on Oct. 20 starting on (UT) 12:09:56. At the position reported in (Kuin et al., GCN 16932) we do not detect the afterglow of GRB 141020A (Cenko et al., GCN 16928; Kuin et al., GCN 16932; Mazaeva et al., GCN 16943). Preliminary photometry is following: date UT start t-T0 Filter Exp. OT UL(3sigma) (mid, days) (s) 2014-10-20 12:09:56 0.2037 clear 60*60 n/d 19.8 The photometry is based on SDSS stars reported in GCN 16943.