TITLE: GCN CIRCULAR NUMBER: 19755 SUBJECT: GRB 160801A: SAO RAS optical observations DATE: 16/08/02 14:33:46 GMT FROM: Moskvitin Alexander at SAO RAS A. Moskvitin (SAO RAS) and I. Soloviev (Saint-Petersburg Univ.), report on behalf of the larger GRB follow-up team. We observed the field of GRB 160801A (D'Elia et al., GCNC#19744) with Zeiss-1000 - the 1-meter telescope of Special Astrophysical Observatory of Russian Academy of Sciences on August 1, 2016, (18:14:58--20:09:29 UT), T_mid - T0 = 9.73 hours. We have obtained 18 x 300 sec. images in the Rc band under good weather conditions. Within the XRT error circle (Goad et al., GCNC#19746) we did not detect any new objects down to the limiting magnitude R_lim = 23.2. When inspecting SDSS images we found a faint stellar-like source J141103.21+132921.4 located near the enhanced XRT error circle. The recalculated magnitude of the object from SDSS images (Epoch = 2003.41) should be R = 20.94 +/- 0.05 (based on the Lupton 2005 equations). In our stacked frame at the edge of the XRT error circle (the offset 2".2) we detected the same source with a brightness of R = 20.9 +/- 0.1. Therefore, we can not detect significant differences between two epochs. This result is in agreement with info reported by Cano et al. (GCNC#19753). Our preliminary photometry is based on the nearby SDSS stars, which magnitudes are converted to the Johnson-Cousins system with the same Lupton 2005 equations. The finding chart based on Zeiss-1000 observations can be found at ftp://ftp.sao.ru/pub/grb/GRB160801A/GRB160801A_z1000.jpg We are grateful to technical staff of SAO RAS for assistance in observations.