K-corrected hard X-ray luminosity computed using the 15–150 keV flux reported in the 3PBC. Given the high numbers of sources used to compute the correlation coefficients, the p-chance for all correlations is below 10⁻⁵ level of significance. Seyfert galaxies are reported as red squares, blazars as blue circles, and all other extragalactic sources as green triangles. Statistical uncertainties are smaller than the size of the points.