{
  "circularId": 42934,
  "editedOn": 1764861885730,
  "eventId": "EP251202a",
  "subject": "EP251202a/trigger 01709249064: Las Cumbres discovery of the optical counterpart",
  "version": 3,
  "body": "Wenxiong Li, Runduo Liang (NAOC), Iair Arcavi (TAU), Ido Keinan (TAU), David Sand (U of Arizona)\nWe observed the position of The EP-WXT trigger 01709249064 with a Las Cumbres 1m telescope at Teide Observatory, Tenerife, 18 mins after the Einstein Probe WXT trigger. We took 2x300s exposures in the broad optical w band.\nWe find a uncataloged source at RA=122.1143 Dec=40.6123 within the EP/WXT error circle and measure the following preliminary photometry calibrated to the r band:\nMJD 61011.089 Mag 15.6\nWe find a faint red likely extended source at this position in Legacy Survey data (https://www.legacysurvey.org/viewer).\nAdditional followup is encouraged.\n",
  "format": "text/plain",
  "submitter": "Wenxiong Li at NAOC <liwenxiong1992@gmail.com>",
  "editedBy": "Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Wenxiong Li at NAOC <liwenxiong1992@gmail.com>",
  "createdOn": 1764643477124,
  "submittedHow": "web",
  "bibcode": "2025GCN.42934....1L"
}