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Measuring distance ratios with CMB-galaxy lensing cross-correlations
We propose a method for cosmographic measurements by combining gravitational lensing of the cosmic microwave background (CMB) with cosmic shear surveys. We cross-correlate the galaxy counts in the lens plane with two different source planes: the CMB at $z\ensuremath{\sim}1100$ and galaxies at an intermediate redshift. The ratio of the galaxy …