Revisiting CFHTLenS cosmic shear: Optimal E/B mode decomposition using COSEBIs and compressed COSEBIs
arXiv:1601.00115 · doi:10.1093/mnras/stw2436
Abstract
We present a re-analysis of the CFHTLenS weak gravitational lensing survey using Complete Orthogonal Sets of E/B-mode Integrals, known as COSEBIs. COSEBIs provide a complete set of functions to efficiently separate E-modes from B-modes and hence allow for robust and stringent tests for systematic errors in the data. This analysis reveals significant B-modes on large angular scales that were not previously seen using the standard E/B decomposition analyses. We find that the significance of the B-modes is enhanced when the data is split by galaxy type and analysed in tomographic redshift bins. Adding tomographic bins to the analysis increases the number of COSEBIs modes, which results in a less accurate estimation of the covariance matrix from a set of simulations. We therefore also present the first compressed COSEBIs analysis of survey data, where the COSEBIs modes are optimally combined based on their sensitivity to cosmological parameters. In this tomographic CCOSEBIs analysis we find the B-modes to be consistent with zero when the full range of angular scales are considered.
17 pages, 10 figures
References in corpus (13)
- Why your model parameter confidences might be too optimistic -- unbiased estimation of the inverse covariance matrix
- Parameter inference with estimated covariance matrices
- Quantifying discordance in the 2015 Planck CMB spectrum
- Dos and don'ts of reduced chi-squared
- CFHTLenS: Cosmological constraints from a combination of cosmic shear two-point and three-point correlations
- Means of confusion: how pixel noise affects shear estimates for weak gravitational lensing
- Baryons, Neutrinos, Feedback and Weak Gravitational Lensing
- The removal of shear-ellipticity correlations from the cosmic shear signal via nulling techniques
- Simulations of Weak Gravitational Lensing - II : Including Finite Support Effects in Cosmic Shear Covariance Matrices
- CFHTLenS and RCSLenS: Testing Photometric Redshift Distributions Using Angular Cross-Correlations with Spectroscopic Galaxy Surveys
- Constraints and tensions in testing general relativity from Planck and CFHTLenS including intrinsic alignment systematics
- Flat-Sky Pseudo-Cls Analysis for Weak Gravitational Lensing
- A New Data Compression Method and its Application to Cosmic Shear Analysis
Cited by in corpus (34)
- KiDS-450: Cosmological parameter constraints from tomographic weak gravitational lensing
- KiDS-1000 Cosmology: Cosmic shear constraints and comparison between two point statistics
- Dark Energy Survey Year 3 Results: Cosmology from Cosmic Shear and Robustness to Modeling Uncertainty
- KiDS+VIKING-450: Cosmic shear tomography with optical+infrared data
- CFHTLenS revisited: assessing concordance with Planck including astrophysical systematics
- KiDS-450: The tomographic weak lensing power spectrum and constraints on cosmological parameters
- Interacting dark energy with time varying equation of state and the tension
- Precision calculations of the cosmic shear power spectrum projection
- KiDS+VIKING-450 and DES-Y1 combined: Mitigating baryon feedback uncertainty with COSEBIs
- Large-scale Stability and Astronomical Constraints for Coupled Dark-Energy Models
- Novel approach towards the large-scale stable Interacting Dark-Energy models and their Astronomical Bounds
- Effects of neutrino mass hierarchies on dynamical dark energy models
- Effects of Anisotropic Stress in Interacting Dark Matter - Dark Energy Scenarios
- Dark Energy Survey Year 3 results: cosmological constraints from the analysis of cosmic shear in harmonic space
- Cosmological parameters, shear maps and power spectra from CFHTLenS using Bayesian hierarchical inference
- Observational Constraints on Oscillating Dark-Energy Parametrizations
- KiDS+2dFLenS+GAMA: Testing the cosmological model with the statistic
- Cosmological constraints on an exponential interaction in the dark sector
- Large-scale (in-) stability Analysis of an Exactly Solved Coupled Dark-Energy Model
- Latest astronomical constraints on some nonlinear parametric dark energy models
- The skewed weak lensing likelihood: why biases arise, despite data and theory being sound
- Discrepancies between CFHTLenS cosmic shear & Planck: new physics or systematic effects?
- Consistent cosmic shear in the face of systematics: a B-mode analysis of KiDS-450, DES-SV and CFHTLenS
- Forecasting Interacting Vacuum-Energy Models using Gravitational Waves
- Flat-Sky Pseudo-Cls Analysis for Weak Gravitational Lensing
- A Unified Catalog-level Reanalysis of Stage-III Cosmic Shear Surveys
- The effects of varying depth in cosmic shear surveys
- The impact of signal-to-noise, redshift, and angular range on the bias of weak lensing 2-point functions
- Dark Energy Survey Year 1: An independent E/B-mode cosmic shear analysis
- Magnification bias in the shear-ratio test: a viable mitigation strategy
- E/B mode decomposition of HSC-Y1 cosmic shear using COSEBIs: cosmological constraints and comparison with other two-point statistics
- Observational constraints on dynamical dark energy with pivoting redshift
- Pure-mode correlation functions for cosmic shear and application to KiDS-1000
- A frequentist view on the two-body decaying dark matter model