{
  "bibcode": "2014GCN.16137....1Z",
  "body": "WeiKang Zheng, Alexei V. Filippenko, Adam Morgan (UC Berkeley), and\nS. B. Cenko (NASA/Goddard Space Flight Center) report on behalf of the\nKAIT GRB team:\n\nThe 0.76-m Katzman Automatic Imaging Telescope (KAIT) at\nLick Observatory responded to Swift GRB 140419A (Marshall et al.,\nGCN 16118) starting at 04:10:00 UT, 189 s after the burst.\nObservations were performed with an automatic sequence in the\nV, I, and clear (roughly R) filters, and the exposure time was\n20 s per image. The bright optical afterglow (Zheng et al.,\nGCN 16119; Guver et al., GCN 16120) was well detected in\nall three filters. Preliminary analysis shows that the afterglow\ndecays with a single power law (with alpha = -1.15) from the\nbeginning of our observations until about 3 hours later when the\nposition moved beyond our reach. The power-law index is consistent\nwith the value reported by Butler et al. (GCN 16121; GCN 16136).\nWe find (V - I) about 1.7 mag (no extinction correction), and no\nobvious color change was detected during our observations. A\npreliminary light curve is posted at\nhttp://astro.berkeley.edu/~zwk/grb/GRB140419A/GRB140419A_kait.png",
  "circularId": 16137,
  "createdOn": 1398057689000,
  "email": "zwk@astro.berkeley.edu",
  "subject": "GRB 140419A: KAIT Refined Analysis",
  "submitter": "Weikang Zheng at UC Berkeley  <zwk@astro.berkeley.edu>",
  "eventId": "GRB 140419A"
}