TITLE: GCN CIRCULAR NUMBER: 18894 SUBJECT: GRB 160117B: Early iTelescope observation DATE: 16/01/19 04:56:17 GMT FROM: Takanori Sakamoto at AGU L. Izzo (URoma1/ICRA), T. Sakamot (AGU) We observed the field of GRB 160117B (Sonbas et al., GCN 18875; Evans et al., GCN 18883; Yurkov et al., GCN 18877; Kruehler et al., GCN 18878; Malesani et al., GCN 18884; Hentunen et al., GCN 18885) with the iTelescope.Net (http://www.itelescope.net) T17 (Plane Wave CDK 0.43m) telescope located at the Siding Spring Observatory (Australia). A single image of 300 s was taken in the R filter, starting at 14:10:03 UT, 636 s after the GRB trigger. We detect the GRB optical afterglow candidate and obtain a photometry estimate of R = 17.523 +- 0.126 using the USNO-B1 catalog. An image of the field of view can be seen at http://goo.gl/aesww1