{
  "bibcode": "2005GCN..4184....1H",
  "body": "A. Henden (AAVSO/USNO) reports on behalf of the USNO GRB Team:\n\nWe have acquired UBVRcIc all-sky photometry for 23x23arcmin\nfields centered on the coordinates of recent GRB localizations\nwith the USNOFS 1.0-m telescope on 1 or 2 photometric nights.\nWe are using a new CCD, and so place an additional zeropoint\nerror of about 0.03mag that should be added in quadrature\nto the errors reported in the files listed below.\nStars brighter than V=13.0 are saturated and should be used\nwith care.  We have placed the photometric data on our\nanonymous ftp site:\n\nftp://ftp.nofs.navy.mil/pub/outgoing/aah/grb/grb050505.dat\nftp://ftp.nofs.navy.mil/pub/outgoing/aah/grb/grb051021.dat\nftp://ftp.nofs.navy.mil/pub/outgoing/aah/grb/grb051022.dat\nftp://ftp.nofs.navy.mil/pub/outgoing/aah/grb/grb051028.dat\n\nSince these bursts had identified optical afterglows, we may\nimprove the photometric calibration on subsequent observing runs.\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": 4184,
  "createdOn": 1130776262000,
  "email": "arne@aavso.org",
  "subject": "Recent GRB UBVRcIc field photometry",
  "submitter": "Arne A. Henden at AAVSO  <arne@aavso.org>"
}