not see any clear evidence [of]{} morphological spectral variations. The IRDIS and IFS images confirm that the disk spirals are launched axisymmetrically at the same corotation radius, as also found by @Stolker2016. We also detect in both IFS and IRDIS images the S3 spiral feature previously noted by @Garufi2013 and @Stolker2016 in the east part of the S2 spiral arm, especially at the longest wavelengths. We finally note that the outer rim looks brighter in the IRDIS $K$-band image (top panel of Fig. \[fig:irdisim\]).

We do not recover in the SPHERE images the radially extended spots to the northeast and the southwest seen in GPI total intensity $J$-band images by @Wahhaj2015. The latter suggested that they could be accretion streams from the disk into the star. Nevertheless, they mentioned that they could also be ADI and/or GPI artifacts because of the small field of view rotation of the data and [the]{} presence of similar features in other GPI data [e.g., @Perrin2015]. Our dataset covers a field of view rotation 1.8 times larger [than]{} the GPI data, which suggests that the features detected in the GPI data are probably artifacts.

@Stolker2016 detected shadow lanes in SPHERE polarized light images covering the 