Maps of the continuum toward IRAS 2A (PdBI), IRAS 4B (PdBI), IRAS 4A (SMA), and VLA 1623 (ALMA). Contours start at 3σ_rms in steps of 3σ_rms until 9σ_rms, then in steps of 20σ_rms (σ_rms in Table 2). We note the absence of any 2′′ triple toward IRAS 2A. The observations of IRAS 4B are dynamic range limited, causing convolution artifacts to appear around the compact continuum peak; these artifacts are not real (see text).