WFCSPEC is for use only with ROSAT WFC data.
Creates a Wide Field Camera `spectrum' (which has only one channel) complete with energy response.
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 an SSDS. In the latter case, all sources in the file will be listed, and the user selects which is to be used.