Free Access

Fig. 6


Spectrometric redshift distribution in the QSO sample (blue slashed histogram). The distribution for the QSO passing the cut zNN > 2.1 is overplotted (red dotted histogram). After this cut, 90.0% of the QSOs with z < 2.2 are removed and only 5.3% of the QSOs in the 2.2 < z < 3.5 region are lost.

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.