{
  "eventId": "EP260403a",
  "bibcode": "2026GCN.44204....1G",
  "body": "C.-L. Guo (NAO, CAS), R.-Z. Li (YNAO) and C.-Y. Dai (NJU) 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 EP260403a. The transient triggered EP-WXT (ID: 01709259505) at 2026-04-03T10:29:10 (UTC). The WXT position of the source is R.A. = 219.150 deg, DEC = -25.502 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. = 219.1572 deg, DEC = -25.5069 deg (J2000) with an uncertainty of 20 arcsec in radius (90% C.L. statistical and systematic).\n\nFurther 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).\n",
  "subject": "EP260403a: Einstein Probe detection of an X-ray transient",
  "createdOn": 1775216460852,
  "submitter": "EP Team at NAOC/CAS <ep_ta@bao.ac.cn>",
  "submittedHow": "web",
  "circularId": 44204,
  "format": "text/plain"
}