ERI_FOLDN

Fold NSPEC energy spectra through the instrument responses

Invocation

CALL ERI_FOLDN( NENER, NSPEC, ESPEC, NCHAN, RMFID, ARFID,

Description

Folds the supplied energy spectrum through the energy response supplied. The response is in the form of a redistribution matrix and an area response. If the former is normalised then the second object is required to convert to counts/cm**2. This routine handles different kinds of response denoted by the 'CompressMethod' data member of RMFID,

ASTERIX - The format is a simple list of the elements of the 2D sparse matrix. ChannelIndices and EnergyIndices arrays hold the channel and energy bin numbers of the non-zero RMF elements.

XANADU -

NONE - Energy and Channels arrays hold boundaries of bins and RMF is a simple 2D array NCHAN x NENER storing the redistribution probability.

Arguments

• NENER = INTEGER (given)
  Number of energy space bins in input spectrum
• NSPEC = INTEGER (given)
  Number of spectra in array
• ESPEC[NENER,NSPEC] = REAL (given)
  Output energy space spectrum
• NCHAN = INTEGER (given)
  Number of channels in input spectrum. Used to check against response
• RMFID = INTEGER (given)
  ADI identifier of RedistributionMatrix object
• ARFID = INTEGER (given)
  ADI identifier of AreaResponse object
• CSPEC[NCHAN,NSPEC] = REAL (returned)
  The channel space spectrum
• STATUS = INTEGER (given and returned)
  The global status.

References

• ERI Subroutine Guide