Magnitude dependence of the contributions to the total completeness correction for the different samples. Upper left: the new quasars identified in the BOSS sample. Upper right: the known quasars that were intentionally removed from the target lists. Lower left (resp. right): the quasars identified in the MMT sample and that appeared point-like (resp. extended) in the coadded SDSS frame. These corrections are computed from all quasars contained in either sample.
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