A Catalog of Low-Mass Star-Forming Cores Observed with SHARC-II at 350
  microns
  We present a catalog of low-mass dense cores observed with the SHARC-II
instrument at 350 microns. Our observations have an effective angular
resolution of 10", approximately 2.5 times higher than observations at the same
wavelength obtained with the Herschel Space Observatory, albeit with lower
sensitivity, especially to extended emission. The catalog includes 81 maps
covering a total of 164 detected sources. For each detected source, we tabulate
basic source properties including position, peak intensity, flux density in
fixed apertures, and radius. We examine the uncertainties in the pointing model
applied to all SHARC-II data and conservatively find that the model corrections
are good to within ~3", approximately 1/3 of the SHARC-II beam. We examine the
differences between two array scan modes and find that the instrument
calibration, beam size, and beam shape are similar between the two modes. We
also show that the same flux densities are measured when sources are observed
in the two different modes, indicating that there are no systematic effects
introduced into our catalog by utilizing two different scan patterns during the
course of taking observations. We find a detection rate of 95% for protostellar
cores but only 45% for starless cores, and demonstrate the existence of a
SHARC-II detection bias against all but the most massive and compact starless
cores. Finally, we discuss the improvements in protostellar classification
enabled by these 350 micron observations.
