The program takes as input either a WFC datafile (an NDF) containing only a single data value (it does not have to be 1-dimensional though), or a source search results file (from PSS). In the latter case, all sources in the file will be listed, and the user selects which is to be used.
The filter in use is looked up in the INSTRUMENT.FILTER component (which should be present in any WFC dataset) and the appropriate instrument energy response is attached to the output spectrum.
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