GCN Circular 1028
Subject
GRB010324, field photometry
Event
Date
2001-03-28T19:49:48Z (25 years ago)
From
Arne A. Henden at USNO/USRA <aah@nofs.navy.mil>
A. Henden (USRA/USNO) reports on behalf of the USNO GRB team:
We have acquired preliminary BVRcIc all-sky photometry for
an 11x11 arcmin field centered at the RXTE ASM localization
(GCN/RXTE ASM; Hurley et al., GCN #1011) for GRB010324
with the USNOFS 1.0-m telescope on one marginally photometric
night. Stars brighter than V=15 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/grb010324.dat
The astrometry in this file is based on linear plate solutions
with respect to USNO-A2.0. The internal errors are less than 100mas.
We have less confidence than usual in the quality of this
photometry. The all-sky reduction of standards had an RMS
error of 1.4 percent, but a high-airmass standard observation
that immediately followed the GRB field observation deviated
from the mean by 4 percent. We will attempt to reobserve
this field on the next photometric night.