a source (the Sun) which is extremely local and well-understood. These electrons and positrons, like the gamma rays discussed above, should be strongly correlated with the center of the Sun, particularly in the high energy range where the effect of the magnetic fields of the Sun and Earth is less significant. Such a hypothesis appears straightforwardly falsifiable using directional and timing data from PAMELA and Fermi. Finally, if charged particles are the primary signature, this immediately leads to a minimal gamma ray flux from the associated 3-body decays that is also directionally correlated with the center of the Sun, and thus testable by Fermi-LAT.

In this paper we analyze the feasibility of detecting electromagnetic particles, $\gamma$, $e^\pm, \cdots$, arising from the delayed decays of metastable mediators produced through WIMP annihilation in the deep interior of the Sun and other planetary bodies within the solar system. Our primary focus is on the capability of modern gamma ray telescopes to search for these local annihilation signatures and the possibility of distinguishing the signal gammas from the solar backgrounds produced by cosmic rays. We demonstrate that in certain corners of the secluded dark matter parameter space, the gamma-ray signature from the center of 