  Multiwavelength identification of AGN is crucial not only to obtain a more
complete census, but also to learn about the physical state of the nuclear
activity (obscuration, efficiency, etc.). A panchromatic strategy plays an
especially important role when the host galaxies are star-forming. Selecting
far-Infrared galaxies at 0.3<z<1, and using AGN tracers in the X-ray, optical
spectra, mid-infrared, and radio regimes, we found a twice higher AGN fraction
than previous studies, thanks to the combined AGN identification methods and in
particular the recent Mass-Excitation (MEx) diagnostic diagram. We furthermore
find an intriguing relation between AGN X-ray absorption and the specific star
formation rate (sSFR) of the host galaxies, indicating a physical link between
X-ray absorption and either the gas fraction or the gas geometry in the hosts.
These findings have implications for our current understanding of both the AGN
unification model and the nature of the black hole-galaxy connection.
  These proceedings review selected results by Juneau et al. (2013, ApJ 764,
176), and their implications. The original work involved several members from
the GOODS and AEGIS teams.
