Fig. 13
Histograms of the W1−W2 colour for quasars and quasar candidates from the following datasets: AllWISE paired up with SDSS DR13 spectroscopic (dotted orange; 141 494 sources; SDSS Collaboration et al. 2016); AllWISE OCSVM AGN candidates (black solid line; 39 940 sources; this paper); AllWISE SVM AGN selection (magenta dot-dashed; 4 443 962 sources; Kurcz et al. 2016); and AllWISEAGN (blue dashed; 1 354 775 sources; Secrest et al. 2015).
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.