TITLE: GCN CIRCULAR NUMBER: 17305 SUBJECT: GRB 150110B: Khureltogot optical upper limit DATE: 15/01/17 19:51:52 GMT FROM: Alexei Pozanenko at IKI, Moscow 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 GRB GRB 150110B (Evans et al., GCN 17291) with ORI-40 telescope of Khureltogot observatory. We obtained several unfiltered images on Jan. 10 starting on (UT) 22:31:36. In a combined image of the first 40 frames we do not detect any optical source within enhanced Swift-XRT position (Beardmore et al., GCN 17294). A photometry of the combined image is following Date UT start t-T0 Filter Exp. ULimit (3sigma) (mid, days) (s) 2015-01-10 22:31:36 0.03113 none 40*60 19.3 The photometry is based on USNO-B1.0 stars USNO-B1_id RA DEC R2 1224-0426323 289.294781 +32.470745 13.52 1225-0423392 289.295778 +32.569009 13.80