Dark matter interpretations of the recent PAMELA, Fermi, and HESS anomalies have generated significant interest in the calculation and measurement of energetic positrons and gamma rays from galactic and extragalactic sources; this talk will discuss two relevant ideas. First, corrections to the positron flux from including contributions from the galactic dark matter halo beyond the diffusion zone – a component ignored in conventional calculations – will be discussed. This will be followed by an investigation of detection prospects and the likelihood of extracting useful information from an observed signal from ACT observation of dwarf galaxies.
