Inhomogeneous systematic signals in cosmic shear observations
arXiv:astro-ph/0507546 · doi:10.1103/PhysRevD.72.043503
Abstract
We calculate the systematic errors in the weak gravitational lensing power spectrum which would be caused by spatially varying calibration (i.e. multiplicative) errors, such as might arise from uncorrected seeing or extinction variations. The systematic error is fully described by the angular two-point correlation function of the systematic in the case of the 2D lensing that we consider here. We investigate three specific cases: Gaussian, ``patchy'' and exponential correlation functions. In order to keep systematic errors below statistical errors in future LSST-like surveys, the spatial variation of calibration should not exceed 3% rms. This conclusion is independently true for all forms of correlation function we consider. The relative size the E- and B-mode power spectrum errors does, however, depend upon the form of the correlation function, indicating that one cannot repair the E-mode power spectrum systematics by means of the B-mode measurements.
8 pages, 3 figures. Changes reflect PRD published version
References in corpus (16)
- Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
- Weak Gravitational Lensing
- Stable clustering, the halo model and nonlinear cosmological power spectra
- An All-Sky Analysis of Polarization in the Microwave Background
- Statistics of Cosmic Microwave Background Polarization
- A Method for Weak Lensing Observations
- Shapes and Shears, Stars and Smears: Optimal Measurements for Weak Lensing
- A new measure for cosmic shear
- Shear calibration biases in weak lensing surveys
- Weak Lensing and Cosmology
- Discriminating weak lensing from intrinsic spin correlations using the curl-gradient decomposition
- B-modes in cosmic shear from source redshift clustering
- Weak Lensing Results from the 75 Square Degree CTIO Survey
- Weak gravitational lensing: reducing the contamination by intrinsic alignments
- Dealing with systematics in cosmic shear studies: new results from the VIRMOS-Descart Survey
- Large scale systematic signals in weak lensing surveys
Cited by in corpus (19)
- Weak Gravitational Lensing
- Gravitational Lensing
- Systematic Errors in Future Weak Lensing Surveys: Requirements and Prospects for Self-Calibration
- Dark Energy Survey Year 1 Results: Redshift distributions of the weak lensing source galaxies
- Catastrophic photometric redshift errors: weak lensing survey requirements
- Cosmic tomographies: baryon acoustic oscillations and weak lensing
- The ring statistics - how to separate E- and B-modes of cosmic shear correlation functions on a finite interval
- Systematic effects in the sound horizon scale measurements
- The impact of galaxy colour gradients on cosmic shear measurement
- PSF Anisotropy and Systematic Errors in Weak Lensing Surveys
- KiDS-SBI: Simulation-based inference analysis of KiDS-1000 cosmic shear
- Forecast of Neutrino Cosmology from the CSST Photometric Galaxy Clustering and Cosmic Shear Surveys
- Atmospheric dispersion effects in weak lensing measurements
- The effects of varying depth in cosmic shear surveys
- Spurious Shear from the Atmosphere in Ground-Based Weak Lensing Observations
- Cosmic shear requirements on the wavelength-dependence of telescope point spread functions
- Euclid preparation. LIII. LensMC, weak lensing cosmic shear measurement with forward modelling and Markov Chain Monte Carlo sampling
- Cosmic Shear E/B-mode Estimation with Binned Correlation Function Data
- Deep lensing with a twist: E and B modes in a field with multiple lenses