A Pan-STARRS1 View of the Bifurcated Sagittarius Stream
  We use data from the Pan-STARRS1 survey to present a panoramic view of the
Sagittarius tidal stream in the southern Galactic hemisphere. As a result of
the extensive sky coverage of Pan-STARRS1, the southern stream is visible along
more than 60 degrees of its orbit, nearly double the length seen by the SDSS.
The recently discovered southern bifurcation of the stream is also apparent,
with the fainter branch of the stream visible over at least 30 degrees. Using a
combination of fitting both the main sequence turn-off and the red clump, we
measure the distance to both arms of the stream in the south. We find that the
distances to the bright arm of the stream agree very well with the N-body
models of Law & Majewski (2010). We also find that the faint arm lies ~5 kpc
closer to the Sun than the bright arm, similar to the behavior seen in the
northern hemisphere.
