Correlations between the X-ray and radio properties. Left: correlations between I_R and I_X computed in the halo (black) and northern (green) relic regions using the meshes shown in the subplots of Fig. 1. Grey points correspond to the cells excluded from the halo analysis (see Sect. 3.3). The slopes and Spearman and Pearson coefficients measured are reported in Table 1. The shadowy regions represent the scatter of the relic correlation (from dark to light grey, 1, 2, 3σ). Right: the correlation between the radio emission and the X-ray residuals.