Complete Hydrogen Column Density Fit Data for NH/AV Relation Calculation

<p>Xspec fit summaries (and graphics of fits) for multiple regions within 17 supernova remnants. Complete data is included on html pages (which make browsing the data easier). Hydrogen column density (NH) fit values were combined with published optical extinction values (AV) to determine the slope of the linear relationship between the two measurements. The NH data alone is included in a spreadsheet format.</p>