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The ongoing Hat Creek 3 mm Point Source Survey is the most sensitive and largest scale survey produced at 3 mm. The survey fills a wavelength gap in point source surveys that stretches from 6 cm to 100 microns. At present we have covered over one square degree of the northern sky with a point source sensitivity of 300 mJy. The selected region coincides with the location of a point source identified by the MSAM experiment. We have not detected any sources. Sources that may appear in continuum emission in our bandpass are extremely dusty objects whose emission peaks at wavelengths longer than 100 microns and synchrotron sources with turnover frequencies near or shortward of 3 mm.
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