TITLE: GCN CIRCULAR NUMBER: 45322 SUBJECT: GRB 260808B / EPF_J230056.0+082842: EP-FXT follow-up observation DATE: 26/08/09 03:21:32 GMT FROM: EP Team at NAOC/CAS <ep_ta@bao.ac.cn> Y. Wang (PMO, CAS; UCB), H. C. Ding (AHNU), R. X. Hu (WHU), Z. X. Li (IHEP, CAS), Y. Liu (NAO, CAS) on behalf of the Einstein Probe (EP) team: EP-FXT performed a follow-up observation of GRB 260808B detected by SVOM/ECLAIRs (Bouchet et al., GCN 45316). The observation started at 2026-08-08 15:55:38 (UTC), about 1.6 hr after the SVOM trigger, with a total exposure time of around 4 ks. On-ground analysis of the FXT data found a source EPF_J230056.0+082842 at R.A. = 345.2350 deg and Dec. = 8.4771 deg (J2000) with an uncertainty of 10 arcsec (radius, 90% C.L. statistical and systematic). The source position is consistent with the optical afterglow confirmed by SVOM/VT (Li et al., GCN 45320). The observed flux is approximately 1.6 × 10^-13 erg s^-1 cm^-2. Launched on January 9, 2024, EP is a space X-ray observatory to monitor the soft X-ray sky with X-ray follow-up capability (Yuan et al. 2022, Handbook of X-ray and Gamma-ray Astrophysics). View this GCN Circular online at https://gcn.nasa.gov/circulars/45322. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...