{
  "submitter": "Xinglong Observatory at National Astronomical Observatories (NAOC), Chinese Academy of Sciences (CAS) <xinglong@nao.cas.cn>",
  "format": "text/plain",
  "circularId": 43425,
  "eventId": "EP260116a",
  "body": "Junjie-Jin (NAOC), Haiyang-Mu (NAOC), Sen-Liu (NAOC), Pengliang-Du (NAOC),\nZhou-Fan (NAOC), Hong-Wu (NAOC) report:\nFollowing the detection of EP260116a by EP-WXT (GCN Circular 43424), we observed the field of EP260116a using the 2.16-m\ntelescope at Xinglong Observatory, NAOC. We obtained 3x300s clear-band frames with a\nmedian time of 2026-01-16T15:26:52 hr after the EP trigger.\nNo uncatalogued optical transient is detected in the stacked images within the 3 arcmin\nEP/WXT error circle (GCN Circular 43424), down to 5-sigma limiting magnitudes of N ~\n20.8, calibrated with Pan-STARRS sources in the field. Also there is no apparent brightening\nfor the catalogued sources within the error circle.",
  "subject": " EP260116a: Xinglong optical upper limit",
  "submittedHow": "web",
  "createdOn": 1768582149124,
  "bibcode": "2026GCN.43425....1J"
}