TITLE: GCN CIRCULAR NUMBER: 18884 SUBJECT: GRB 160117B: NOT optical afterglow observations DATE: 16/01/18 01:27:54 GMT FROM: Daniele Malesani at Dark Cosmology Centre, Niels Bohr Inst D. Malesani (DARK/NBI), A. de Ugarte Postigo (IAA-CSIC and DARK/NBI), R. Carrera (IAC-ULL), C.E. Martinez-Vazquez (IAC-ULL), P. Jakobsson (Univ. Iceland), report on behalf of a larger collaboration: We observed the optical counterpart of GRB 160117B (Sonbas et al., GCN 18875; Yurkov et al., GCN 18877; Kruehler et al., GCN 18878) with the Nordic Optical Telescope (NOT) equipped with the ALFOSC camera. In a 300-s exposure taken starting on Jan 18.028 UT (10.7 hr after the GRB), we measure for the afterglow a magnitude of R = 20.36 +- 0.11 (Vega), calibrated against several nearby USNO-B1 stars (R1 magnitudes), with the uncertainty mostly due to the scatter in the USNO values. [GCN OPS NOTE(18jan16): Per author's request, C.E.M-V was added, and the affiliations were adjusted for A.dU.P. and R.C..]