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Size of spectroscopic calibration samples for cosmic shear photometric redshifts
Zhaoming Ma, Gary Bernstein
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…
SuperNova Acceleration Probe (SNAP): Investigating Photometric Redshift Optimization
Tomas Dahlen, Bahram Mobasher, Stephanie Jouvel +5
The aim of this paper is to investigate ways to optimize the accuracy of photometric redshifts for a SNAP like mission. We focus on how the accuracy of the photometric redshifts de…
Lensing Systematics from Space: Modeling PSF effects in the SNAP survey
H. F. Stabenau, B. Jain, G. Bernstein +1
Anisotropy in the point spread function (PSF) contributes a systematic error to weak lensing measurements. In this study we use a ray tracer that incorporates all the optical eleme…
Detectability of CMB tensor B modes via delensing with weak lensing galaxy surveys
Laura Marian, Gary M. Bernstein
We analyze the possibility of delensing CMB polarization maps using foreground weak lensing (WL) information. We build an estimator of the CMB lensing potential out of optimally co…