Millimeter-wave Point Sources from the 2500-square-degree SPT-SZ Survey:
  Catalog and Population Statistics
  We present a catalog of emissive point sources detected in the SPT-SZ survey,
a contiguous 2530-square-degree area surveyed with the South Pole Telescope
(SPT) from 2008 - 2011 in three bands centered at 95, 150, and 220 GHz. The
catalog contains 4845 sources measured at a significance of 4.5 sigma or
greater in at least one band, corresponding to detections above approximately
9.8, 5.8, and 20.4 mJy in 95, 150, and 220 GHz, respectively. Spectral behavior
in the SPT bands is used for source classification into two populations based
on the underlying physical mechanisms of compact, emissive sources that are
bright at millimeter wavelengths: synchrotron radiation from active galactic
nuclei and thermal emission from dust. The latter population includes a
component of high-redshift sources often referred to as submillimeter galaxies
(SMGs). In the relatively bright flux ranges probed by the survey, these
sources are expected to be magnified by strong gravitational lensing. The
survey also contains sources consistent with protoclusters, groups of dusty
galaxies at high redshift undergoing collapse. We cross-match the SPT-SZ
catalog with external catalogs at radio, infrared, and X-ray wavelengths and
identify available redshift information. The catalog splits into 3980
synchrotron-dominated and 865 dust-dominated sources and we determine a list of
506 SMGs. Ten sources in the catalog are identified as stars. We calculate
number counts for the full catalog, and synchrotron and dusty components, using
a bootstrap method and compare our measured counts with models. This paper
represents the third and final catalog of point sources in the SPT-SZ survey.
