Title:

A Lensing Map ... A Redshift Survey




Margaret J. Geller
Smithsonian Astrophysical Observatory



Abstract:

The Smithsonian Hectospec Lensing Survey (SHELS) combines a
large deep complete redshift survey with a weak lensing map
from the Deep Lens Survey (Wittman et al. 2002; 2005). The
Hectospec, a 300-fiber instrument for the f/5 MMT, enables
efficient redshift surveys out to $z \sim$ 0.8$.  Maps of
the velocity dispersion based on systems identified in the
redshift survey enable comparison of the three-dimensional
matter distribution with the two-dimensional projection
mapped by weak lensing. The lensing map images the
three-dimensional matter distribution obtained from the
kinematic data. A comparison of maps derived from narrow
slices in redshift demonstrates the strong modulation of the
weak lensing signal by large-scale structure