TITLE: GCN CIRCULAR NUMBER: 22073 SUBJECT: GRB 171027A: KAIT Optical Upper Limit DATE: 17/10/30 23:39:12 GMT FROM: Weikang Zheng at UC Berkeley WeiKang Zheng and Alexei V. Filippenko (UC Berkeley) report on behalf of the KAIT GRB team: The 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at Lick Observatory, responded to Swift GRB 171027A (D'Avanzo et al., GCN 22053) starting at 08:26:07 UT, 181 s after the burst. Observations were performed with an automatic sequence in the clear (roughly R), V, and I filters, and the exposure time was 20 s per image. We do not detect the optical source (Watson et al., GCN 22057; Butler et al., GCN 22061) in our images. The typical limiting magnitude of our single clear image is about 19.0 calibrated to USNO B1.0.