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In this section we show examples of the two dimensional structure of
the images which will be used to derive LSF's, cross-dispersion
profiles and encircled energy functions in the later sections.
Figure 2 shows representative 2-D on-axis images from
which the dispersion and cross-dispersion profiles are derived. Both
of these images are sampled at 1 m resolution which is 24 times
better than the resolution of ACIS and the image size is 256 pixels
on a side.