{
  "submittedHow": "web",
  "circularId": 44139,
  "createdOn": 1774782673294,
  "subject": "The EP-WXT trigger 01709259209 (EP260329b?): Las Cumbres discovery of the optical counterpart",
  "format": "text/plain",
  "submitter": "Wenxiong Li at NAOC <liwenxiong1992@gmail.com>",
  "body": "Wenxiong Li, Runduo Liang (NAOC), Iair Arcav, Ido Keinan (TAU), David Sand (U of Arizona)\n\nWe observed the position of EP-WXT trigger 01709259209 with a Las Cumbres 1m telescope at Siding Spring Observatory, Australia, 6 mins after the Einstein Probe WXT trigger. We took 2x300s exposures in the broad optical w-band.\nWe find an uncataloged source at RA=181.3124, Dec=4.3516 within the EP-WXT error circle and measure the following preliminary photometry calibrated to the r band: \nEpoch 1: MJD 61128.446 Mag 18.7\nEpoch 2: MJD 61128.450 Mag 17.1\n\n\nThe presented magnitudes are calibrated using Pan-STARRS sources in the field and are not corrected for Galactic extinction. We identify a faint source at this position in the Legacy Survey data, with \nr=24.08 mag. Additional follow-up observations are encouraged.",
  "eventId": "EP260329b"
}