to noise. These maps have a rms of 6.3 and 27 $\mu$Jy beam$^{-1}$ at the center, which increases towards the edges as the maps are corrected by the primary beam, reaching values of 7.0 and 34 $\mu$Jy beam$^{-1}$ at $5\arcsec$ (140 au) for band 6 and 7, respectively. The band 6 and band 7 synthesised beams have dimensions of $0\farcs80\times0\farcs79$ and $0\farcs58\times0\farcs47$[^3], respectively, reaching an approximate resolution of 22 au for band 6 and 15 au for band 7. The higher resolution and sensitivity of these new data reveal a nearly axisymmetric broad disc with a large decrease or gap in the surface brightness centered at a radius of $\sim80$ au as suggested by [@Ricci2015]. The disc extends from nearly $40$ to 180 au, being one of the widest discs resolved at millimetre wavelengths [@Matra2018mmlaw]. We compute the total flux by integrating the disc emission inside an elliptical mask with a 180 au semi-major axis and the same aspect ratio as the disc (see §\[sec:parmodel\]). We find a total flux of $16.1\pm1.6$ and $34.4\pm3.5$ mJy at 1.1 and 0.86 mm (including 10% absolute flux uncertainties), leading to a spatially unresolved millimetre spectral index of $2.64\pm0.48$, consistent with results from [@Ricci2015atca] 