{
  "bibcode": "2019GCN.24931....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 the Swift GRB 190630B (Krimm et al.,\nGCN 24913; Cummings et al. GCN 24918) starting at 310s after the burst.\nObservations were performed with a sequence in the clear (roughly R),\nV, and I filters, and the exposure time was 60 s per image. Further\nanalysis on our reported afterglow candidate (Zheng & Filippenko, GCN\n24914) shows that the candidate position is within the enhanced XRT\nerror circle (Page et al., GCN 24919), and its brightness faded more than\n2 magnitude during our ~2 hours observing range. We therefore confirm\nthis is the optical afterglow of GRB 190630B. A preliminary KAIT clear\nband light curve is available at:\nhttp://w.astro.berkeley.edu/~zwk/grb/GRB190630B/GRB190630B_kait.jpg",
  "circularId": 24931,
  "createdOn": 1561959705000,
  "email": "weikang@berkeley.edu",
  "subject": "GRB 190630B: KAIT Optical Afterglow Confirmation",
  "submitter": "Weikang Zheng at UC Berkeley  <weikang@berkeley.edu>",
  "eventId": "GRB 190630B"
}