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varabs, zvarabs: photoelectric absorption

A photoelectric absorption with variable abundances using cross-sections set by the xsect command. The column for each element is in units of the column in a solar abundance column of an equivalent hydrogen column density of $10^{22}$cm$^{-2}$. The Solar abundance table used is set by the abund command. These models differ from the models vphabs and zvphabs only by the units in which the abundances are expressed (vphabs and zvphabs define these relative to the solar abundance, not in terms of column density).

par1-par18 equivalent columns for H, He, C, N, O, Ne, Na, Mg, Al, Si, S, Cl, Ar, Ca, Cr, Fe, Co, Ni

The zvarabs variant allows the user to specify a (fixed) redshift, i.e. the parameters are:

par1-par18 equivalent columns for H, He, C, N, O, Ne, Na, Mg, Al, Si, S, Cl, Ar, Ca, Cr, Fe, Ni, Co
par19 redshift