TITLE: GCN CIRCULAR NUMBER: 26872 SUBJECT: GRB 200115A: Assy optical observations DATE: 20/01/24 17:57:09 GMT FROM: Alexei Pozanenko at IKI, Moscow A. Volnova (IKI), V. Kim (AFIF), A. Pozanenko (IKI), M. Krugov (AFIF), E. Mazaeva (IKI), S. Belkin (IKI) report on behalf of larger GRB IKI FuN collaboration: We observed the field of GRB 200115A (Cenko et al., GCN 26771) with AZT-20 1.5 m telescope of Assy-Turgen observatory starting on Jan. 18 (UT) 16:55:27 in r'-filter. We do not detect the afterglow candidate (GCNs 26790, 26818) up to r'=22.8 (AB) and hence we consider the object found in BAT error circle (Cenko et al., GCN 26771) as the optical afterglow of GRB 200215A. Photometry of the field is following. Date UT start t-T0 Filter Exp. OT UL (3sigma) (mid, days) (s) 2019-10-18 16:55:27 3.22608 r' 13*180 n/d 22.8 The photometry is based on the nearby SDSS-DR12 stars.