Optimal filters for the moving lens effect
  We assess the prospects for detecting the moving lens effect using
cosmological surveys. The bulk motion of cosmological structure induces a
small-scale dipolar temperature anisotropy of the cosmic microwave radiation
(CMB), centered around halos and oriented along the transverse velocity field.
We introduce a set of optimal filters for this signal, and forecast that a high
significance detection can be made with upcoming experiments. We discuss the
prospects for reconstructing the bulk transverse velocity field on large scales
using matched filters, finding good agreement with previous work using
quadratic estimators.
