TITLE: GCN CIRCULAR NUMBER: 15386 SUBJECT: Swift Trigger 575905: KAIT Optical Upper Limit DATE: 13/10/26 07:37:56 GMT FROM: Weikang Zheng at UC Berkeley WeiKang Zheng, Alexei V. Filippenko, Adam Morgan (UC Berkeley), and S. B. Cenko (NASA/Goddard Space Flight Center) report on behalf of the KAIT GRB team: The 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at Lick Observatory, responded to Swift Trigger 575905 (Cenko et al., GCN 15384) starting at 06:42:00 UT, 148 s after the burst. Observations were performed with an automatic sequence in the V, I, and clear(roughly R) filters, and the exposure time was 20 s per image. Comparing to the SDSS image, we do not detect new sources within BAT error circle. Typical limiting magnitudes of our single clear image is about 18.7.