  Atmospheric Cerenkov Telescopes, including HESS and MAGIC, have detected a
spectrum of gamma-rays from the galactic center region which extends from
$\sim$200 GeV or lower, to at least $\sim$10 TeV. Although the source of this
radiation is not yet known, the spectrum appears to behave as a simple
power-law, which is not the expectation for gamma-rays generated through the
annihilation of dark matter particles. If instead we conclude that the source
of these gamma-rays is astrophysical in origin, this spectrum will constitute a
background for future dark matter searches using gamma-rays from this region.
In this paper we study how this background will affect the prospects for
experiments such as GLAST to detect dark matter in the galactic center. We find
that only a narrow range of dark matter annihilation rates are potentially
observable by GLAST given this newly discovered background and considering
current constraints from EGRET and HESS. We also find that a detection of line
emission, while not completely ruled out, is only possible for a very narrow
range of dark matter models and halo profiles.
