Probing Dark Energy with Lensing Magnification in Photometric Surveys
  I present an estimator for the angular cross-correlation of two tracers of
the cosmological large-scale structure that utilizes redshift information to
isolate separate physical contributions. The estimator is derived by solving
the Limber equation for a re-weighting of the foreground tracer that nulls
either clustering or lensing contributions to the cross-correlation function.
Applied to future photometric surveys, the estimator can enhance the
measurement of gravitational lensing magnification effects to provide a
competitive independent constraint on the dark energy equation of state.
