GRB 240828A: KAIT Optical Afterglow Candidate

The 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at Lick Observatory, observed the field of GRB 240828A (The Fermi GBM team, GCN 37317; Srijan et al., GCN 37328) around the Fermi/LAT position (Gupta & Lalla, GCN 37331) starting at 03:32, Aug. 29 UT, about 12.61 hours after the burst. Observations were performed in 3 x 3 tiling mode, a set of clear (roughly R) filter images were obtained. Within the XRT afterglow (Beardmore et al., GCN 37337) error circle, we detected a bright uncataloged optical afterglow candidate at J2000 position of (error ~0.5"): RA: 15:02:02.97 Dec: +36:31:43.93 We estimate the clear band magnitude to be ~17.9 mag at 12.69 hours after the burst. Further observations are encouraged.