Free Access
Fig. 7

Redshift distribution for the nine BL Lac objects with reliable photometric redshifts (blue filled histogram) together with the distribution for the BL Lac in the 2LAC catalog (empty histogram; Ackermann et al. 2012). Sources with z < 0.5 have been omitted for clarity.
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.