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A photo-electric absorption using Wisconsin (Morrison and McCammon; ApJ 270, 119) cross-sections.

displaymath12953

where tex2html_wrap_inline12813 (E) is the photo-electric cross-section (NOT including Thomson scattering) and 

par1	 = 	equivalent hydrogen column (in units of 10tex2html_wrap_inline12815 atoms/cmtex2html_wrap_inline12909 )


par2	 = 	redshift

Keith Arnaud (kaa@genji.gsfc.nasa.gov)
Wed May 28 10:59:33 EDT 1997