SWAG: Distribution and Kinematics of an Obscured AGB Population toward
  the Galactic Center
  Outflows from AGB stars enrich the Galactic environment with metals and
inject mechanical energy into the ISM. Radio spectroscopy can recover both
properties through observations of molecular lines. We present results from
SWAG: "Survey of Water and Ammonia in the Galactic Center". The survey covers
the entire Central Molecular Zone (CMZ), the inner 3.35deg x 0.9deg (~480 x
130pc) of the Milky Way that contains ~5x10^7 Mo of molecular gas. Although our
survey primarily targets the CMZ, we observe across the entire sightline
through the Milky Way. AGB stars are revealed by their signature of double
peaked 22 GHz water maser lines. They are distinguished by their spectral
signatures and their luminosities, which reach up to 10^-7 Lo. Higher
luminosities are usually associated with Young Stellar Objects located in CMZ
star forming regions. We detect a population of ~600 new water masers that can
likely be associated with AGB outflows.
