TITLE: GCN CIRCULAR NUMBER: 19083 SUBJECT: GRB 160225A: NOT optical observations DATE: 16/02/26 02:10:23 GMT FROM: Dong Xu at NAOC/CAS D. Xu (NAOC/CAS), D. Malesani (DARK/NBI), N. Tanvir (U. of Leicester), A. Kvammen (NOT) report on behalf of a large collaboration: We observed the field of GRB 160225A (Siegel et al. GCN 19075) using the 2.56m Nordic Optical Telescope (NOT) equipped with the ALFOSC camera. Observations started at 23:31:27 UT on 2016-02-25 (i.e., 8.56 hr post-burst) and 9x200s exposures were obtained in the Sloan r- and i-band, respectively. The optical afterglow is detected at the WHT position (Wiersema et al., GCN 19082) and presumably also the MITSuME position (Yoshii et al. GCN 19080). We measured m(r)=23.25 +/- 0.15 at 8.86 hr post-burst and m(i) = 22.55 +/- 0.07 at 9.48 hr post-burst, calibrated with nearby SDSS stars.