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Fig. B.2.

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Δ(HR)/HR as a function of CF for different values of the column density. The dotted line curve corresponds to NH = 5 × 1022cm−2, the solid curve to NH = 1 × 1023cm−2, the short-dashed curve to NH = 2 × 1023cm−2, the long-dashed curve to NH = 3 × 1023cm−2, and the dash-dotted curve refers to NH = 5 × 1023cm−2

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