HD 10647 major axis profiles (top) for each of the archival-only, ARKS-only, or combined (‘All’) baselines, and their associated difference profiles (bottom) obtained by self-subtracting the profiles about 0.0″. The major axis direction is negative towards the south-east of the disc. The red and green dash-dot lines represent the ±3σ and ±5σ profile differences for the combined data; the shading gives the error associated with each of the difference profiles, scaled by $\sqrt{2}$ to account for the self-subtraction. We also show the ≈40–80 au radial location (wq¹ Eri’s dust clump from Lovell et al. (2021a).