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Fig. 2


Left panel: redshift distribution of the SDSS-DR10 (black histogram), SDSS-DR9 (green histogram; Pâris et al. 2012) and SDSS-DR7 (purple histogram; Schneider et al. 2010) quasars over the redshift range 06. Right panel: redshift distribution of the full SDSS-DR10 quasar sample (black histogram), and the SDSS-DR10 CORE (blue histogram) and BONUS (purple histogram) samples over the redshift range 2 to 4. Note that the full DR10Q sample includes CORE, BONUS and quasars observed as part of ancillary programs.

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