{
  "body": "Guojiong Yang(NAO, CAS),  Jiaying Cao(IHEP),  Wenfeng Wen(SZTU) and Haiwu Pan (NAO, CAS) on behalf of the Einstein Probe (EP) team:\n\nEP-FXT performed a follow-up observation of the SVOM/ECLAIRs-detected burst GRB 260225A (SVOM/sb26022501; Ma et al., GCN 43829) starting at 2026-02-25T09:26:28 UTC, approximately 35 minutes after the SVOM trigger, with a total exposure time of 6090 s.\n\nAt the optical position reported by Basa et al. (GCN Circ. 43837), an uncatalogued X-ray source (EPF_J133924.5+443450; RA, Dec = 204.852, 44.5806, J2000) is detected, with a 90% confidence positional uncertainty of 2.1 arcsec (statistical only).\n\nThe spectrum can be well fitted with an absorbed power-law model, with the Galactic hydrogen column density. The best-fit photon index is about 1.56.\n\nThe corresponding unabsorbed flux in the 0.5–10 keV band is 1.89×10^-12 erg cm^-2 s^-1\nFlux_err: 2.3 × 10^-13 erg cm^-2 s^-1 (1σ)\n\nLaunched 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).\n",
  "subject": "GRB 260225A: EP-FXT follow-up observation",
  "submittedHow": "web",
  "format": "text/plain",
  "circularId": 43839,
  "createdOn": 1772078847279,
  "submitter": "EP Team at NAOC/CAS <ep_ta@bao.ac.cn>",
  "eventId": "GRB 260225A",
  "bibcode": "2026GCN.43839....1Y"
}