zpcfabs

A partial covering fraction absorption. Relative abundances are set by the abund command.

where (E) is the photo-electric cross-section (NOT including Thomson scattering) (see phabs) and

par1	 = 	equivalent hydrogen column (in units of 10 atoms/cm )

par2	 = 	covering fraction (0 < par2   .) (dimensionless)

par3	 = 	redshift