TITLE: GCN CIRCULAR NUMBER: 19818 SUBJECT: GRB 160816A iTelescope observation DATE: 16/08/18 03:00:05 GMT FROM: Takanori Sakamoto at AGU Y. Kitaoka, T. Sakamoto, A. Yoshida (AGU) We observed the field of GRB 160816A detected by Fermi (Racusin et al., GCN Circ. 19802) with the iTelescope.Net (http://www.itelescope.net) T7 (17" Plane Wave) telescope located at the AstroCamp Observatory (Nerpio, Spain). 15 images of 60 sec exposures were taken in the R filter starting from August 16 22:50:57 (UT) about 5.9 hours after the trigger and stopped on August 16 23:26:36 (UT). We do not detect the optical afterglow both in the individual images and the stacked image at the X-ray afterglow position (Kennea et al., GCN Circ. 19806). The estimated five sigma upper limit of the combined image (total exposure of 900 sec) is ~18.3 using the USNO-B1 catalog.