GCN Circular 2114

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

We have acquired UBVRcIc all-sky photometry for
a 11x11 arcmin field centered at the coordinates
of the optical transient (Peterson and Price, GCN 1974
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for the HETE burst GRB030328 (GCN 1978
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with the USNOFS 1.0-m telescope on one photometric
night.  Stars brighter than V=13.0 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/grb030328.dat
The astrometry in this file is based on linear plate solutions
with respect to UCAC2.  The external errors are less than 100mas.
The external photometric errors are approximately 0.03mag
at this stage.

Because of scattering from the two bright stars to the south of the
optical transient, this file has many false stars.  You should carefully
match the RA,DEC of any object against USNO-B to ensure that the
object is real.

There is now a README file in that directory that gives
generic observational information and file formats.

We will most likely obtain an additional night of photometry
in a week or two when the moon is no longer a concern.
As always, you should check the dates on the .dat file prior to
final publication to get the latest photometry.