Fig. 8.
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Δ(αOX) = αOX − αOX, L10 distribution. αOX, L10 refers to the value derived from the L10 relation at a given L2500 Å. The BAL and non-BAL QSOs are represented as indigo and purple bars, respectively. The grey bar is for undetected sources, which have all been included in the X-ray-weakest bin. The grey-shaded area highlights the locus of X-ray-weak sources.
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