Input Files

1. Input counts spectrum dataset specified by the parameter spectrumset. The format of this dataset is defined in the OGIP document [2], but for the purposes of rmfgen, it must contain the following information:
   • The global attributes TELESCOP, INSTRUME, FILTER.
   • A table named SPECTRUM, containing the attributes SPECPIX, SPECDELT and SPECVAL. This table in turn contains:
     • A column named CHANNEL, which contains the attributes TLMIN and TLMAX.

2. Input detector map. This is a file or array specified by the parameter detmaparray and containing the following information:
   • A 2-d array of any numerical type. By default this will be the primary array in an image dataset.
   • The WCS attributes CTYPE1, CRPIX1, CRVAL1, CDELT1, CTYPE2, CRPIX2, CRVAL2, CDELT2. This map must be generated in terms of [DETX,DETY] coordinates, so the axis types, ie CTYPE1 and CTYPE2, must be DETX and DETY respectively.
   This map is only used by rmfgen if detmaptype is set to 'dataset'.

3. Input photon spectrum dataset specified by the parameter photonspectrumset. This is a DAL dataset containing:
   • A table labelled DISTRIBUTION. This in turn contains
     • A 32-bit real column labelled ENERGY, containing the energy for each data point (keV).
     • A 32-bit real column labelled FLUX, containing the flux level (photons/s/cm2).

   This describes the estimated incident photon spectrum. This is used during the pile-up correction process.

   This dataset is not used if the parameter modelpileup is false.