Redshift distributions. The extragalactic sample is shown in the left panel. Sources with spectroscopic redshift and high reliability photometric redshift are shown separately. The right panel shows the normalised redshift histograms for spectroscopic and highly reliable photo-z comparing the hard and soft samples. The hard X-ray selection yields a relatively local AGN sample, with a median redshift ⟨z⟩ = 0.34, compared to the main sample that has ⟨z⟩ = 0.94.