Oversampled PACS 70 μm image of Betelgeuse after subtraction of the smooth halo of the circumstellar envelope. North is up, east to the left. The pixel size is 1′′. In the left-hand panel, the power α has been taken as constant over the full region (α = 1.78). The field-of-view (FOV) is 720′′  ×  325′′. The red circle with a radius of 20′′ shows the region where some PSF artefacts are still visible; the green circle indicates a region with radius of 2′. In the right-hand panel two independent profiles were fitted before and beyond 50′′ to suppress the high flux values around 50′′ so as to better visualize the complex structure around 50–60′′ in the southeastern region. The field-of-view (FOV) is 970′′  ×  640′′. Distances to a few asymmetric structures are indicated in red.