Fig. 4.
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Relationship between X-ray-derived column densities and optical depths. Local obscured AGN and ULIRGs were used for the correlations presented here. Left: X-ray-derived column densities vs. H2O optical depths (R = 0.85; log (
. Right: X-ray-derived column densities vs. 9.7 μm silicate optical depths. The gray dashed lines correspond to the best linear fit (R = 0.68; log (
).
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