TITLE: GCN CIRCULAR NUMBER: 17332 SUBJECT: GRB 150120A: KAIT Optical Upper Limit DATE: 15/01/21 01:45:57 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 150120A (D'Elia et al., GCN 17310) starting at 02:59:24 UT, 98 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 any new source in our images within the enhanced XRT error circle (Evans et al., GCN 17317). The typical limiting magnitude of our single clear image is about 18.5 calibrated to USNO B1.0.