TITLE: GCN CIRCULAR NUMBER: 31203 SUBJECT: GRB 211211A: KAIT Optical Afterglow Candidate DATE: 21/12/11 14:37:08 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 211211A (Trigger 1088940) starting at Dec. 11, 13:46:25 UT. We detected an uncataloged optical afterglow candidate at position (error ~0.5"): RA: 14:09:10.09 (J2000) Dec: +27:53:18.23 (J2000) We estimate the clear band magnitude ~20.3 in out clear band image at ~0.63 hours after burst. We can not estimate the variability at this time, further observations are encouraged. We also notice the afterglow candidate location is very close to a SDSS galaxy (SDSS ID: 1237665429707096375, with r = 19.53 mag), it is unclear if the galaxy is related to the GRB.