Probability density functions (PDFs) for the flux–flux relation for the active region set for a spatial resolution of 1.5″. Here the respective basal fluxes are subtracted. The intensities are normalised to the respective median value and are plotted on a logarithmic scale. The red ellipses show the fit to the contour level at 1.5 × FWHM. The blue lines indicate the power-law-slopes calculated as the average from the ellipse fits of the contour levels at [1,1.5,2] × FWHM. See Sect. 3.3.2