GCN Circular 22647
GRB 180418A: KAIT Optical Afterglow Candidate 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 180418A (D'Elia et al., GCN 22646 starting at 06:46:41 UT, 125 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. Inside the Swift/BAT position error circle we detected an afterglow candidate at position: RA: 11:20:29.20 (j2000) Dec: 24:55:58.8 (j2000) The clear band magnitude declined from Mag ~15.8 to ~17.2 during our observations. Observation are on going, multi-band follow-ups are encouraged.