TITLE: GCN CIRCULAR NUMBER: 45149 SUBJECT: EP260623a: KAIT optical observations DATE: 26/07/13 17:04:57 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 EP260623a (Wang et al., GCN 45020, 45035; Svinkin et al., GCN 45046) at 5.85 hours after the burst, and again at 1.34 days after the burst. A set of clear (roughly R) filter images were obtained. We clearly detected the optical afterglow (Li et al., GCN 45021; Izzo et al., GCN 45022; Angulo et al., GCN 45024; Brivio et al., GCN 45025; Jiang et al., GCN 45026; Li et al., GCN 45027; Jelinek et al., GCN 45029; Lee et al., GCN 45030; Saikia et al., GCN 45034; Bochenek & Perley, GCN 45040; Busmann et al., GCN 45042; Brivio et al., GCN 45045) in our coadd images. We measure its brightness decayed from 18.8 +/- 0.1 mag (Vega) to 22.2 +/- 0.2 mag with a power-law decay index of ~2.0. View this GCN Circular online at https://gcn.nasa.gov/circulars/45149. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...