{
  "bibcode": "2006GCN..4607....1H",
  "body": "A. Henden (AAVSO/USNO) reports on behalf of the USNO GRB Team:\n\nWe have acquired BVRcIc all-sky photometry for an 11x11 arcmin\nfield centered on the coordinates of the optical afterglow\n(Kann et al., GCN 4577) for the Swift burst GRB060124\n(Holland et al., GCN 4570) with the USNOFS 1.0-m telescope\non one photometric night.  Stars brighter than V=13.5 are\nsaturated and should be used with care.  We have placed the\nphotometric data on our anonymous ftp site:\nftp://ftp.nofs.navy.mil/pub/outgoing/aah/grb/grb060124.dat\n\nThe astrometry in this file is based on linear plate solutions\nwith respect to USNO-A2.  The external errors are about 300mas.\nThe estimated external photometric error is about 0.02mag.\n\nAs always, you should check the dates on the .dat file prior to\nfinal publication to get the latest photometry.  There is\na README file on the ftp directory to give you information\nabout the procedures used to calibrate these fields.",
  "circularId": 4607,
  "createdOn": 1138382237000,
  "email": "arne@aavso.org",
  "subject": "GRB060124, BVRcIc field calibration",
  "submitter": "Arne A. Henden at AAVSO  <arne@aavso.org>",
  "eventId": "GRB 060124"
}