TITLE: GCN CIRCULAR NUMBER: 43609 SUBJECT: GRB 260131A: KAIT optical observations DATE: 26/02/03 07:55:33 GMT FROM: Weikang Zheng at UC Berkeley <weikang@berkeley.edu> WeiKang Zheng (UCB) 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 260131A (Fermi GBM Team, GCN 43579; Sugai et al., GCN 43580; Roberts et al., GCN 43585; Frederiks et al., GCN 43590; Luo et al., GCN 43591; Li et al., GCN 43605) at ~0.914d and again at ~1.875d after the burst. A set of clear (roughly R) filter images were obtained. We detected the optical afterglow (Gompertz et al., GCN 43586; Lee et al., GCN 43587; Saccardi et al., GCN 43595; García García et al., GCN 43599, Shi et al. GCN 43601, Jayaraman et al., GCN 43606; Zhu et al., GCN 43607) in our coadd images and estimate the afterglow to be 17.8 +/- 0.1 and 19.2 +/- 0.2 mag (Vega) respectively. View this GCN Circular online at https://gcn.nasa.gov/circulars/43609. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...