Fig. 1
Serpens region as seen in 850 μm dust continuum emission with SCUBA (Davis et al. 1999) in contours, at 0.4, 0.6, 1, 1.4, 1.8, 2.4 and 5 Jy beam-1. In grey scale is the 24 μm from Spitzer MIPS (Harvey et al. 2007). All sources seen in this image, both the 24 μm and the 850 μm sources, are Class 0 and I, with only a few flat-spectrum sources. The 850 μm sources are labelled.
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