{
  "bibcode": "2007GCN..6885....1K",
  "body": "D. Kocevski, D. A. Perley, and M. Modjaz (UC Berkeley) report:\n\nBeginning at 04:47:42 UT (2007-10-11) we began a second series of  \nimaging on the field of GRB 071010A (GCN 6733) using the Keck I  \ntelescope (+LRIS).  We acquired 6 images with an effective exposure  \nof 270s in R band and 360s in V band.\n\nThe optical afterglow (GCN 6860) is still detected and has faded  \nsince our previous imaging epoch (GCN 6872).  Preliminary aperture  \nphotometry of the source indicates that it has faded by 0.55  \nmagnitudes since our previous imaging.  Using the same calibration  \nsystem as in our previous circular, we estimate a preliminary  \nmagnitude of R=19.42",
  "circularId": 6885,
  "createdOn": 1192115486000,
  "email": "kocevski@berkeley.edu",
  "subject": "GRB 071010A: Continued Keck Imaging",
  "submitter": "Daniel Kocevski at UC Berkeley  <kocevski@berkeley.edu>",
  "eventId": "GRB 071010A"
}