Scattered light images of the disk (Sect. 3.4) at different bands after applying an unsharp filter as described in Sect. 5.2. A software mask of radius is used to remove the spurious signal that dominates the central regions of the images. The dynamical range of each image has been arbitrarily scaled to highlight the disk features, and the color scale is linear. The cross at the center indicates the major/minor axis of the disk, at PA of 76.8° (Zhang et al. 2014). Arrow “1” points to the faint, ring-like halo artefact observed at at J-band, while arrow “2” indicates the elliptical artefact that especially affects the IFS images, with increasing strength towards shorter wavelengths. In all images, a dip/decrement in brightness at ~ 20° (east form north) is evident in the bright inner rim of the disk, although it is partially masked by artefact “2” (see text). This dip was previously noticed by Pinilla et al. (2015) at R′-band.