TITLE: GCN CIRCULAR NUMBER: 44536 SUBJECT: GRB 260511A: KAIT optical afterglow observations DATE: 26/05/11 07:56:17 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 GRB 260511A (Fermi GBM Team, GCN Circ. 44529; Godet et al., GCN Circ. 44532) starting at 06:15:44, 132 seconds after SVOM trigger. Observations were performed in 3 x 3 tiling mode, and a set of clear (roughly R) filter images were obtained. The first image covered the optical afterglow (Jiang et al., GCN 44533; Akl et al. GCN 44534 Saccardi et al., GCN 44535) was at 06:16:57, 205 seconds after the burst, in which we measure the afterglow brightness to be 16.7 +/- 0.1 mag (Vega) calibrated to APASS catalog. Observations are on going. View this GCN Circular online at https://gcn.nasa.gov/circulars/44536. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...