TITLE: GCN CIRCULAR NUMBER: 19163 SUBJECT: GRB 160310A: LCOGT-SAAO optical upper limits DATE: 16/03/10 19:53:37 GMT FROM: Dong Xu at NAOC/CAS D. Xu (NAOC/CAS) reports on behalf of a collaboration: We observed the field of GRB 160310A (Vianello et al., GCN 19158) using the LCOGT 1-m located at Sutherland, South Africa. Observations started at 18:57:18 UT on 2016-03-10 (i.e., 18.75 hr after the burst) and 2x300s frames were obtained in R- and I-band each. No credible source is detected within or at the edge of the error circle of the XRT Source 2 reported in Gibson et al. (GCN 19162), down to limiting magnitudes of R~20.0 and I~18.6, respectively. [GCN OPS NOTE(10mar16): Per author's request, "SSO" was changed to "SAAO".]