GCN Circular 664

A. Henden (USRA/USNO) reports on behalf of the USNO GRB team:

We have acquired preliminary UBVRcIc all-sky photometry for
an 11x11 arcmin field that covers the
error box for GRB000424 with the USNOFS 1.0-m telescope on one
marginally photometric night.  Stars brighter than
V=14 are saturated and should be used with care.
We have placed the photometric data on our anonymous ftp site:
ftp://ftp.nofs.navy.mil/pub/outgoing/aah/grb/grb000424.dat
The current photometry has a potential external zero-point
error of about three percent.  The astrometry in this file
is based on linear plate solutions with respect to USNO-A2.0.
The internal errors are less than 100mas.
  Further calibration of this field will be performed if
an optical afterglow is identified.