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SPRESP
SPRESP attaches a spatial response to the input dataset. A spatial
response is a precomputed grid of point spread functions tailored
to a the spatial and energy sub-space occupied by a particular
dataset. They are most useful in applications which make very
intensive use of the psf. If such intensive use is not envisaged it
is better to keep using the normal psf system, as this places fewer
(if any) constraints on the binning of the dataset.
Once the response is attached, a default of RESPFILE will be
offered at the PSF prompt of any application using the psf system.
Accepting this default will generally inhibit all further user
interaction regarding the psf for that application.
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