The physical properties of Spitzer/IRS galaxies derived from their UV to
  22 $\mu$m spectral energy distribution
  We provide the basic integrated physical properties of all the galaxies
contained in the full CASSIS with available broad-band photometry from UV to 22
$\mu$m. We have collected photometric measurements in 14 wavelengths from
available public surveys in order to study the SED of each galaxy in CASSIS,
thus constructing a final sample of 1,146 galaxies in the redshift range
0<z<2.5. The SEDs are modelled with the CIGALE code which relies on the energy
balance between the absorbed stellar and the dust emission while taking into
account the possible contribution due to the presence of an AGN. We split the
galaxies in three groups, a low-redshift, a mid-redshift and a high-redshift
and find that the vast majority of the Spitzer/IRS galaxies are star-forming
and lie on or above the star-forming MS of the corresponding redshift.
Moreover, the emission of Spitzer/IRS galaxies with z<0.1 is mostly dominated
by star-formation, galaxies in the mid-redshift bin are a mixture of star
forming and AGN galaxies, while half of the galaxies with z<0.5 show moderate
or high AGN activity. Additionally, using rest-frame NUV-r colour, S\'ersic
indices, optical OIII and NII emission lines we explore the nature of these
galaxies by investigating their structure as well as their star-formation and
AGN activity. Using a colour magnitude diagram we confirm that 97% of the
galaxies with redshift smaller than 0.5 have experienced a recent
star-formation episode. For a sub-sample of galaxies with available structural
information and redshift smaller than 0.3 we find that early-type galaxies are
placed below the MS, while late-type galaxies are found on the MS as expected.
Finally, for all the galaxies with z<0.5 and available optical spectral line
measurements we find that galaxies with high AGN luminosity, as calculated by
CIGALE, are most likely to be classified as composite or AGNs by optical
spectral lines.
