TITLE: GCN CIRCULAR NUMBER: 19199 SUBJECT: GRB 160314A: ISON-Ussuriysk optical upper limit, updated photometry and correction of GCN 19184 DATE: 16/03/16 06:14:44 GMT FROM: Alexei Pozanenko at IKI, Moscow A. Volnova (IKI), E. Chornaya (UAFO), E. Mazaeva (IKI), A. Matkin (UAFO, ISON), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: After receiving full data set of our observations (GCN 19184) we refine photometry and correct UT time of the observations. The field of the GRB 160314A (D'Elia et al., GCN 19182) was observed with SANTEL-650 (0.65m) telescope of UAFO/ISON-Ussuriysk observatory starting on March, 14 (UT) 11:56:51 under clear sky but with a high ground wind speed. We obtained series of unfiltered images of 30 s exposure. In a combined image we do not detect optical afterglow (D'Elia et al., GCN 19182; Siegel & D'Elia, GCN 19187; Malesani et al., GCN 19191). Photometry of combined images is following Date UT start t-T0 Filter Exp. OT U_limit (3sigma) (mid, days) (s) 2016-03-14 11:56:51 0.01728 none 3*30 n/d 18.7 2016-03-14 11:56:51 0.04575 none 30*30 n/d 20.1 The photometry is based on nearby SDSS star J073110.29+170129.9 assuming R_Lupton = 16.132.