{
  "subject": "EP260321a: Las Cumbres upper limit",
  "bibcode": "2026GCN.44079....1L",
  "eventId": "EP260321a",
  "circularId": 44079,
  "submittedHow": "web",
  "body": "Runduo Liang, Wenxiong Li (NAOC), Iair Arcavi (TAU), Ido Keinan (TAU), David Sand (U of Arizona)\n\nWe observed the position of EP260321a (GCN 44068, GCN 44075) with a Las Cumbres 1m telescope at Cerro Tololo Inter-American Observatory, Chile, about 11.25 hours after the Einstein Probe WXT trigger. We took 2x300s exposures in the broad optical r-band. We didn’t detect any uncataloged source within the EP-FXT refined position down to a 3-sigma limiting r-band mag of ~20.8. \n\nThe presented magnitudes are calibrated with Pan-STARRS sources in the field and not corrected for Galactic extinction. Additional follow-up is encouraged.",
  "createdOn": 1774185142886,
  "format": "text/plain",
  "submitter": "aujust@mail.ustc.edu.cn"
}