The primary beam corrected linear mosaic of the 1.3 mm continuum data obtained in two SMA pointings towards MM1 and MM2 (Jy/beam). The central portion, outlined in blue, indicates the region shown in Fig. 3. The synthesised beam is shown in the bottom left hand corner of the image. Contours are at − 3σ,3σ,5σ,7σ,9σ where σ ≈ 1 mJy/beam. Positive contours are indicated by the solid lines and negative contours by the dashed lines. Letters A, B, C and D label the 4 largest sub-fragments seen in the data, defined by the 3σ contours.