{
  "body": "Y.H. Cheng (SWIFAR,YNU), Y. Wang (PMO), R. D. Liang, W. D. Zhang (NAOC) on behalf of the Einstein Probe (EP) team: \n\nWe report on the detection of an X-ray transient by the Wide-field X-ray Telescope (WXT) on board the Einstein Probe (EP) mission, designated EP250905a. The transient triggered EP-WXT (ID: 01709201261) at 2025-09-05T11:11:49 (UTC). The WXT position of the source is R.A. = 4.441 deg, DEC = 37.493 deg (J2000) with an uncertainty of 3 arcmin in radius (90% C.L. statistical and systematic). \n\nA follow-up observation with the Follow-up X-ray Telescope (FXT) was performed automatically. Within the WXT error circle, an uncatalogued X-ray source was detected at R.A. = 4.4517 deg, DEC = 37.4728 deg (J2000) with an uncertainty of 20 arcsec in radius (90% C.L. statistical and systematic). Further information will be updated when the telemetry data are received. \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).",
  "eventId": "EP250905a",
  "submittedHow": "web",
  "bibcode": "2025GCN.41725....1C",
  "submitter": "EP Team at NAOC/CAS <ep_ta@bao.ac.cn>",
  "format": "text/plain",
  "subject": "EP250905a: Einstein Probe detection of an X-ray transient ",
  "circularId": 41725,
  "createdOn": 1757076266157
}