{
  "version": 2,
  "subject": "EP250827a: Las Cumbres independent detection of the optical counterpart",
  "circularId": 41555,
  "eventId": "EP250827a",
  "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>",
  "body": "\nWenxiong Li (NAOC), Ido Keinan (TAU), Iair Arcavi (TAU), David Sand (U of Arizona)\n\nWe observed the position of EP250827a (Hua et al. GCN 41553) with a Las Cumbres 1m telescope at CTIO starting on 2025-08-27 07:51:31 UT (less than 5 minutes after the alert and less than 11 minutes after the event). We obtained 2x300s exposures in the broad optical w band.\n\nWe find a source at RA=3.4679 Dec=-56.4979, not present in archival Legacy Survey (https://www.legacysurvey.org/viewer) images and measure a magnitude of 18.71 +- 0.06, calibrated to the r band (consistent with the Gemini detection; Levan et al. GCN 41554).\n\nAddition followup is encouraged.",
  "bibcode": "2025GCN.41555....1L",
  "submittedHow": "web",
  "createdOn": 1756285364292,
  "format": "text/plain",
  "editedOn": 1758894653823
}