TITLE: GCN CIRCULAR NUMBER: 20030 SUBJECT: GRB 161011A: TSHAO afterglow candidate DATE: 16/10/11 22:10:02 GMT FROM: Alexei Pozanenko at IKI, Moscow E. Mazaeva (IKI), A. Kusakin (Fesenkov Astrophysical Institute), A. Volnova (IKI), I. Reva (Fesenkov Astrophysical Institute), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of GRB 161011A (D'Elia et al., GCN 20023) with Zeiss-1000 (East) 1-m telescope of Tien Shan Astronomical Observatory. We obtained several images in R filter starting on Oct. 11 (UT) 13:13:27. In the enhanced XRT error circle (Osborne al., GCN 20026) we marginally detect an object which is absent in SDDS-DR9 catalog. Preliminary photometry of the object which we suggest as an afterglow candidate is following Date UT start t-T0 Filter Exp. OT Err. UL (mid, days) (s) 2016-10-11 13:13:27 0.32098 R 21*120 20.6 0.3 20.8 Photometry is based on nearby SDSS-DR9 stars (Lupton transformations): SDSS-DR9_id R J162253.68+081834.3 15.26 J162242.22+082241.1 14.18 J162312.65+081527.2 14.72 J162302.30+081614.7 14.96 A finding chart can be found at http://grb.rssi.ru/GRB161011A/GRB161011A_TSHAO_161011_fc.png