pnspectra processes the cleaned event file output from espfilt to produce intermediate files for the creation of model particle background spectra and images by the task pnback.
Warning and requirements: pnspectra was part of the package esas, integrated into SAS. It is now standalone, but (still) limited to work within esas' data reduction scheme (c.f. esas cookbook and/or esas flowchart). This is especially true with respect to input files structure and names. In particular, pnspectra assumes that other tasks from the package, espfilt for filtering and cheese for point source exclusion have been successfully run for the exposures to be used. However, modularization for SAS-19 allows user-chosen filenames as optional parameters, with code-derived names that follow the esas schema created if the user chooses not to enter their own filenames.
