stars, surrounded by dust, and the cooling flows of the interstellar medium ejected by supernovae may produce additional IR and X emission, between each other.

To study the activity of the galaxies at different wavebands, we collected data on galaxies starting from the original data of fluxes at 60, 100 $\mu$m, CO(1-0) 2.6 mm and soft X-ray used to compile our catalogues [@norm_cat; @inter_cat]. The merging of the two above catalogues produces 1764 known values of far infrared fluxes (1837 have 100 $\mu$m flux), 391 soft X-ray fluxes and 434 values of the CO(1-0) line luminosity. We extracted from LEDA catalogue [@leda] the values of the distance moduli, blue absolute magnitudes and morphological classification for all of them.

Galaxies with evident sign of interactions or disturbed morphologies according to the catalogues of @arp [@am; @vv] are 1038. We shall refer to them as “perturbed galaxies”. The remaining 1915 galaxies that appear neither morphologically nor dynamically perturbed are called “normal galaxies”. In our sample, we have 253 galaxies that have spectral classification of the nucleus and 231 of these appear to host an AGN (Seyfert 1, 2 or transition type, Seyfert 3 or Liners) according to the classifications of @ho and 