TeV Active Galactic Nuclei: Multifrequency Modeling
  In the recent years, the new generation of Imaging Atmospheric Cerenkov
Telescopes successfully detected very high energy (VHE; E>100 GeV) gamma-ray
emission from a growing number of Active Galactic Nuclei (AGNs), mainly
belonging to the blazar class.
  Among these recent results, we will mainly focus in this work on two recent
discoveries made with the H.E.S.S. experiment: the tremendously active state of
the blazar PKS 2155-304 observed in July 2006 and the discovery of VHE
gamma-rays from the radio galaxy Cen A. On the one hand, the observation of
very fast variability in PKS 2155-304 challenges the current radiative standard
models for TeV blazars. On the other hand, the discovery of Cen A as a source
of VHE gamma-rays firmly establishes, together with the previous detection of M
87, radio galaxies as a new class of VHE emitters.
