with the Submillimetre Common User’s Bolometer Array (SCUBA) at the James Clerk Maxwell Telescope (JCMT) (Young et al. 2006), at 1.2 mm with with the Max Planck Millimeter Bolometer (MAMBO) at the IRAM 30 meter telescope (J. Kauffmann et al. 2006, in preparation), and also at 1.2 mm with the SEST Imaging Bolometer Array (SIMBA) at the Swedish ESO Submillimeter Telescope (SEST) (K. Brede et al. 2006, in preparation). SCUBA also provides observations at 450 [$\mu$m]{}, although often of much lower quality. However, since the peak of a 15 K blackbody occurs at 340 $\mu$m, a reliable measurement that is close to this wavelength and fills the gap between 70 $\mu$m (*Spitzer*) and 850 $\mu$m (SCUBA) is essential to constrain the peak of the Spectral Energy Distributions (SEDs) of these objects. The MIPS instrument aboard *Spitzer* can also provide images at 160 $\mu$m, but such data are unavailable for many of the low-mass cores of interest. Thus, SHARC-II, with its capability to provide high-quality data at 350 $\mu$m, is ideally suited to fill this gap.

SHARC-II is a background-limited 350 and 450 $\mu$m facility camera mounted on the Caltech Submillimeter Observatory (CSO) at Mauna Kea, Hawaii (Dowell et al. 2002). 