511 keV longitude (left) and latitude (right) profiles for XDM models with m_χ = 1.5 TeV (blue) and m_χ = 2 TeV (green), and fixed mass splitting Δm = 4 MeV, compared to INTEGRAL/SPI data (red points). Solid lines correspond to an NFW profile, dashed lines to a cNFW profile. The best-fit values of σ_mr for each case are indicated in the legend.