{
  "subject": "GRB 250419A: KAIT optical afterglow observations",
  "bibcode": "2025GCN.40171....1Z",
  "eventId": "GRB 250419A",
  "createdOn": 1745042682515,
  "body": "WeiKang Zheng (UCB), Xuhui Han (NAOC), Pinpin Zhang (NAOC) and\n\nAlexei V. Filippenko (UCB) report on behalf of the KAIT GRB team:\n\n\nThe 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at\n\nLick Observatory, observed the field of SVOM GRB 250419A (Wang\n\net al., GCN 40168) with a set of clear (roughly R) images starting\n\nat 1.47 hours after the trigger. We clearly detected the optical\n\nafterglow (López et al., GCN 40169; Xin et al., GCN 40170) in our\n\nsingle image. The afterglow is measured at 18.0 +/- 0.2 mag (Vega)\n\nat 1.47 hours after the trigger. It remained to be similar brightness\n\nfor about 40 minutes then decayed after that. Observation is on\n\ngoing.\n",
  "editedBy": "Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Weikang Zheng at UC Berkeley <weikang@berkeley.edu>",
  "submitter": "Weikang Zheng at UC Berkeley <weikang@berkeley.edu>",
  "editedOn": 1755696197382,
  "version": 2,
  "circularId": 40171,
  "submittedHow": "email",
  "format": "text/plain"
}