|AHELP for CIAO 4.3 Sherpa v1||
Partial covering absorption by partially ionized material. XSpec model.
This model uses a grid of XSTAR photionized 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 component.
|1||nh||equivalent hydrogen column (in units of 10^22 atoms/cm^2)|
|2||logxi||log(xi) where xi=L/nr^2|
This information is taken from the XSpec User's Guide. Version 12.6.0l of the XSpec models is supplied with CIAO 4.3.
For a list of known bugs and issues with the XSPEC models, please visit the XSPEC bugs page.
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