TITLE: GCN CIRCULAR NUMBER: 44510 SUBJECT: GRB 260509A: KAIT optical observations DATE: 26/05/10 06:13:38 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 260509A (Götz et al., GCN 44504 starting at 04:56 UT, 7.08 hours after the burst. A set of clear (roughly R) filter images were obtained. We detected the afterglow (O'Neill et al., GCN 44505; Saccardi et al., GCN 44506; Wu et al., GCN 44507; Álvarez et al., GCN 44509) in our coadd image. We measure its brightness to be 21.1 +/- 0.2 mag (Vega) at mid time of 7.37 hours after the burst. View this GCN Circular online at https://gcn.nasa.gov/circulars/44510. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...