Detected, dereddened flux densities of the DSO (black points) and the fitted continuum: thermal black-body fit curve corresponding to warm dust (orange solid and dashed lines) and non-thermal power-law emission fit S_ν ∝ ν^{− α} with the index α = 2.0 ± 0.3 (red solid and dashed lines). For comparison, we also plot the black-body curve corresponding to the star of T_⋆ = 4200 K and L_⋆ = 20 L_⊙ (pre-main-sequence star without a dusty envelope; grey solid line).