SED of the integrated system, as estimated with the GRaTer package at 1 (left) and 10 kyrs (right) after the breakup. The full line represents the total (stellar photosphere + disc) luminosity, while the dashed line represents the sole contribution of the dust disc and the dotted one is that of the stellar photosphere. The scattered light contribution to the disc SED, which dominates thermal emission at short wavelengths, has been calculated assuming isotropic scattering.