Spectral energy distribution determined for the dust emission within the circumbinary disc (α = 3.0, black line) and in the envelope (α = 3.4, dotted dashed line). The flux densities for the disc and envelope are indicated as filled circles and open triangles, respectively. The errors are dominated by the uncertainty in the flux calibration, which is assumed to be ~10%. The dashed line shows the SED determined from the free-free (centimetric) emission detected with the Very Large Array (Alves et al. 2019).