DR1-detected CVs (main catalog) listed also in the hard catalog. The left panel compares the flux in the hard band (2.3–5.0 keV) with the flux in the detection band (0.2–2.3 keV). The diagonal lines illustrate the relation between the fluxes for a thermal plasma of 3, 15, and 30 keV, respectively, from bottom to top. The right panel shows the flux in the hard band as a function of the hardness ratio HR1. The one CRTS CV and the one AM CVn object are not shown to not confuse the diagram.