Fig. 11.
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Illustration explaining the (i − W4)AB vs. NH relationship based on geometry. Filled black, gray, and cyan circles denote SMBHs, dust clumps, and gas absorbers, respectively. Filled pink ellipses and white trapezoids represent X-ray sources and accretion disks, respectively. Cyan and orange arrows indicate fluxes from X-ray sources and accretion disks, respectively.
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