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Paper detail

Can CMB Lensing Help Cosmic Shear Surveys?

Yes! Upcoming galaxy shear surveys have the potential to significantly improve our understanding of dark energy and neutrino mass if lensing systematics can be sufficiently controlled. The cross-correlations between the weak lensing shear, galaxy number counts from a galaxy redshift survey, and the CMB lensing convergence can be used to calibrate the shear multiplicative bias, one of the most challenging systematics in lensing surveys. These cross-correlations can significantly reduce the deleterious effects of the uncertainties in multiplicative bias.

preprint2013arXivOpen access
Sudeep DasJosquin ErrardDavid Spergel
astro-ph.CO
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Sudeep DasJosquin ErrardDavid Spergel

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