Size of spectroscopic calibration samples for cosmic shear photometric redshifts

Abstract

Weak gravitational lensing surveys using photometric redshifts can have their cosmological constraints severely degraded by errors in the photo-z scale. We explore the cosmological degradation vs the size of the spectroscopic survey required to calibrate the photo-z probability distribution. Previous work has assumed a simple Gaussian distribution of photo… (More)

Topics

4 Figures and Tables

Slides referencing similar topics