ACA 7 m continuum emission at 1.3 mm overlaid on the composite Spitzer 3.6 and 5.8 μm emission and Herschel 70 μm emission. The 1.3 mm map is shown with filled contours at levels of 10, 20, 40, 80,160, and 320 mJy beam⁻¹. The mosaicked field of view is outlined by primary beam response (yellow contour at 0.2). The white contours define the dense region at levels of 3.0 and 5.0 × 10²² cm⁻².