TITLE: GCN CIRCULAR NUMBER: 30227 SUBJECT: GRB 210610B: Continued KAIT Optical Detection DATE: 21/06/12 20:26:48 GMT FROM: Weikang Zheng at UC Berkeley WeiKang Zheng and Alexei V. Filippenko (UC Berkeley) report on behalf of the KAIT GRB team: We continued observing the optical afterglow of GRB 210610B (e.g. Page et al., GCN 30170; Zheng & Filippenko, GCN 30204) with the 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at Lick Observatory. A total of 30x60s images were obtained in the clear (roughly R) filter. The optical afterglow was detected in the coadd image with a mag of 20.0 +/- 0.2 at ~1.44 days after burst, calibrated to the Pan-STARRS1 catalog.