  Weak-scale secluded sector dark matter can reproduce the observed dark matter
relic density with thermal freeze-out within that sector. If nature is
supersymmetric, three portals to the visible sector - a gauge portal, a Higgs
portal, and a gaugino portal - are present. We present gamma ray spectra
relevant for indirect detection of dark matter annihilation in such setups.
Since symmetries in the secluded sector can stabilize dark matter, $R$-parity
is unnecessary, and we investigate the impact of $R$-parity violation on
annihilation spectra. We present limits from the Fermi Large Area Telescope
observations of dwarf galaxies and projections for Cherenkov Telescope Array
observations of the galactic center. Many of our results are also applicable to
generic, non-supersymmetric setups.
