{
  "bibcode": "2020GCN.27263....1Z",
  "body": "WeiKang Zheng and Alexei V. Filippenko (UC Berkeley) report on\nbehalf of the KAIT GRB team:\n\nThe 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at\nLick Observatory, responded to Swift GRB 200228B (Laha et al.,\nGCN 27254) starting at 11:21:06 UT, 395 s after the burst.\nObservations were performed with an automatic sequence in the\nclear (roughly R), V, and I filters, and the exposure time was 20 s\nper image. We do not detect any optical afterglow candidate within\nthe enhanced XRT position error circle (Evans et al., GCN 27256),\nneither in single image, nor in the co-add images.\nThe typical limiting magnitude of our single clear image is about\n18.0 mag calibrated to the Pan-STARRS1 catalog.",
  "circularId": 27263,
  "createdOn": 1582916992000,
  "email": "weikang@berkeley.edu",
  "subject": "GRB 200228B: KAIT Optical Upper Limit",
  "submitter": "Weikang Zheng at UC Berkeley  <weikang@berkeley.edu>",
  "eventId": "GRB 200228B"
}