TITLE: GCN CIRCULAR NUMBER: 45400 SUBJECT: GRB260818A: EP-FXT follow-up observation DATE: 26/08/19 03:49:35 GMT FROM: EP Team at NAOC/CAS <ep_ta@bao.ac.cn> Z.M. Wang(BNU), C.Y. Dai(NJU), D. F. Hu(PMO,CAS) and H.W. Pan(NAOC) on behalf of the Einstein Probe (EP) team: EP-FXT performed a follow-up observation of GRB 260818A detected by SVOM/ECLAIRs (Yin et al., GCN 45391). The observation started at 2026-08-18 02:43:32(UTC), about 1.67 hr after the SVOM trigger, with a total exposure time of around 4.6 ks. On-ground analysis of the FXT data found several uncataloged sources inside the ECLAIRs error region. Name | RA | DEC | Sep_obj (arcmin) | Flux (erg/cm^2/s) EPF_J232025.8-320549 | 350.1077 | -32.0971 | 6.101382 | 1.3205e-13 EPF_J231936.3-320537 | 349.9012 | -32.0935 | 6.582593 | 5.9746e-14 EPF_J231953.3-320838 | 349.9729 | -32.1449 | 6.812141 | 2.0801e-13 EPF_J231912.9-320034 | 349.8036 | -32.0095 | 10.701601 | 1.0260e-12 EPF_J231953.3-320838 | 349.9722 | -32.1440 | 6.770902 | 2.0112e-13 EPF_J232037.7-320633 | 350.1572 | -32.1093 | 8.604395 | 4.5878e-14 with uncertainties of 10 arcsec (radius, 90% C.L. statistical and systematic). 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/45400. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...