Continuum images of the two observation blocks with natural weighting. The left panel is for OB1 on 2017 March 28, and the right panel is for OB2 on 2018 May 9. The middle panel represents the UV tapering (1.8″ × 1.5″) image of OB2 for matching the beam size of OB1. Contours are drawn at the levels of [−2, 2, 4, 6] × σ_rms(left: σ_rms = 27 μJy beam⁻¹, middle: σ_rms = 22 μJy beam⁻¹, right: σ_rms = 15 μJy beam⁻¹) to better highlight the disc structure. The beam size is represented by a white ellipse (left: 2.24″ × 1.84″, middle: 2.28″ × 1.89″, right: 1.43″ × 1.12″) in the bottom-left corner. The star location is marked with a red star symbol.