Note: This function is not yet available.
The intensity distribution will be fitted with TBD functions (splines, etc) and the parameters will be stored in CCF CalSourceData. A second extension will hold the energy spectrum for the high energy component (TBC).
The intensities of the calibration sources will be corrected for the half life of the source.
The function returns a energy spectrum in the range from E_LOW to E_HIGH for a given position on the CCD.
This function is used for the background determination after definition of a order selection cut.