  To investigate the effect of feedback from active galactic nuclei (AGN) on
their surrounding medium, we study the diffuse X-ray emission from galaxy
groups and clusters by coupling the Astrophysical Plasma Emission Code (APEC)
with the cosmological hydrodynamic simulation involving AGN feedback. We
construct a statistical sample of synthetic Chandra X-ray photon maps to
observationally characterize the effect of AGN on the ambient medium. We show
that AGN are effective in displacing the hot X-ray emitting gas from the
centers of groups and clusters, and that these signatures remain evident in
observations of the X-ray surface brightness profiles.
