Luminosity in the VHE γ-ray band vs. luminosity in radio (a), mid-infrared (b), optical (c), X-ray (d), and γ-ray (e) bands in logarithmic scale. The different symbols represent the data of different groups (see text): low state group A (circle), high state group A (triangle) and group B (greencross). The correlation functions of the various groups are shown with low state group A (blue dashed line), the combined dataset of high state group A and group B (red line), and the combined dataset of low state group A and group B (blue line).