  Clusters of galaxies, such as the Virgo cluster, host enormous quantities of
dark matter, making them prime targets for efforts in indirect dark matter
detection via potential radiative signatures from annihilation of dark matter
particles and subsequent radiative losses of annihilation products. However, a
careful study of ubiquitous astrophysical backgrounds is mandatory to single
out potential evidence for dark matter annihilation. Here, we construct a
multiwavelength spectral energy distribution for the central radio galaxy in
the Virgo cluster, M87, using a state-of-the-art numerical Synchrotron Self
Compton approach. Fitting recent Chandra, Fermi-LAT and Cherenkov observations,
we probe different dark matter annihilation scenarios including a full
treatment of the inverse Compton losses from electrons and positrons produced
in the annihilation. It is shown that such a template can substantially improve
upon existing dark matter detection limits.
