TITLE: GCN CIRCULAR NUMBER: 18885 SUBJECT: GRB 160117B: iTelescope T17 optical observations DATE: 16/01/18 04:04:33 GMT FROM: Veli-Pekka Hentunen at Taurus Hill Obs,A95 Veli-Pekka Hentunen, Markku Nissinen and Tuomo Salmi (Taurus Hill Observatory, Varkaus, Finland) report: We have detected GRB 160117B optical afterglow at iTelescope observatory T17 using 0.43-m f/6.8 astrograph and FLI ProLine E2V CCD. The observations were started at 2016-01-17 14:34:35 (UT). Nine unfiltered images with 300 sec exposure time were taken. The afterglow was detected at the position RA 08:48:46.85 and DEC -16:22:00.0. The following magnitude was obtained from the observations using USNO-B1.0 0736-0196371 (R1=16.52) as a comparison star: Tmid(s)+T0 Filter Exp. time Mag Mag. Err. 4367 Clear 9x300s 18.6CR 0.2 --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus