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 0−6. 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.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.