Model for partial covering of partially ionised absorbing material.
NOTE: This model is now in the Xspec release and this page is superceded by the Xspec manualThis uses a grid of XSTAR photionised absorption models (calculated assuming a microturbulent velocity of 200km/s) for the absorption, then assumes that this only covers some fraction f of the source, while the remaining (1-f) of the spectrum is seen directly. This is the model used by Reeves et al (2008) 'On why the iron K-shell absorption in AGN is not the signature of the local warm-hot intergalactic medium', and may also be more generally applicable to the spectral complexity seen in Narrow Line Seyfert 1 AGN (Miller et al 2007, A&A, 463, 13).
This is a multiplicative model. The parameters are
par1 = column density in units of 1022 cm^-2
To install this model download the source code (zxipcf.f), model datafile (zxipcf_mtable.fits), and the model parameter description file (zxipcf_lmodel.dat). zxipcf will look for its model datafile in the current directory or the directory specified in xspec by using xset ZXIPCF_DIR directory.
Questions and comments? Contact Chris Done: chris.done(at)durham.ac.uk
Keith Arnaud, Lab. for High Energy Astrophysics, NASA/Goddard Space Flight Center
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