X-ray luminosity of the clusters sample vs. the corresponding radio luminosity of the central radio source and the 944 MHz radio luminosity of the central radio source vs. the central cooling time of each cluster. Left panel: 1.4 GHz kinetic luminosity extrapolated from 944 MHz vs. the X-ray luminosity of the corresponding cluster. The individual points are color-coded with respect to the logarithmic central cooling time. Right panel: 944 MHz radio luminosity of the central radio source vs. the central cooling time of each cluster. The vertical dashed blue line indicates t_cool = 7.7 Gyr and separates CC and NCC clusters. The black line indicates the fit: log L_R = ( − 0.31 ± 0.03)×log t_cool + (34.17 ± 0.31).