Observed and calculated leptonic SED for HESS J1507–622 for a continuous injection of electrons. Two cases are shown: solid lines represent a model with an assumed (young) objects age of 10⁴ years and rather steep electron injection spectrum of Γ_e = 2.6; the dashed lines represent a rather old object with an age of 3 × 10⁵ years and an electron injection spectrum with Γ_e = 2.0. For more details on the modeled SED see main text.