TITLE: GCN CIRCULAR NUMBER: 40338 SUBJECT: GRB 250502A: KAIT optical observations DATE: 25/05/04 08:20:51 GMT FROM: Weikang Zheng at UC Berkeley <weikang@berkeley.edu> WeiKang Zheng (UCB), Xuhui Han (NAOC), Pinpin Zhang (NAOC) and Alexei V. Filippenko (UCB) report on behalf of the KAIT GRB team: The 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at Lick Observatory, observed the field of SVOM GRB 250502A (Wang et al., GCN 40313) starting at 08:58, May 02 UT, about 12 minutes after the burst. Observations were performed in 3 x 3 tiling mode, a set of clear (roughly R) filter images were obtained. We detected the optical afterglow (Rakotondrainibe et al., GCN 40315; An et al., GCN 40319; Li et al., GCN 40320; Gosh et al., GCN 40322; de Ugarte Postigo et al., GCN 40328; Perez-Fournon et al., GCN 40330; Odeh & Guessoum, GCN 40331; Bochenek & Perley, GCN 40333; Corcoran et al., GCN 40334 and Leonini et al., GCN 40337), which decayed from 17.4 +/- 0.1 mag (Vega) at 963s to 18.7 +/- 0.2 mag at 7.6ks after the burst. View this GCN Circular online at https://gcn.nasa.gov/circulars/40338. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...