Towards a Bias-Free Selection Function in Shear Measurement
arXiv:2006.02095 · doi:10.3847/1538-4357/abcda3
Abstract
Sample selection is a necessary preparation for weak lensing measurement. It is well-known that selection itself may introduce bias in the measured shear signal. Using image simulation and the Fourier_Quad shear measurement pipeline, we quantify the selection bias in various commonly used selection function (signal-to-noise-ratio, magnitude, etc.). We proposed a new selection function defined in the power spectrum of the galaxy image. This new selection function has low selection bias, and it is particularly convenient for shear measurement pipelines based on Fourier transformation.
arXiv comment10 pages, 9 figures. Submitted
References in corpus (47)
- The Seventh Data Release of the Sloan Digital Sky Survey
- Weak Gravitational Lensing
- KiDS-450: Cosmological parameter constraints from tomographic weak gravitational lensing
- Dark Energy Survey Year 1 Results: Cosmological Constraints from Cosmic Shear
- CFHTLenS tomographic weak lensing cosmological parameter constraints: Mitigating the impact of intrinsic galaxy alignments
- A Catalog of Bulge+Disk Decompositions and Updated Photometry for 1.12 Million Galaxies in the Sloan Digital Sky Survey
- Cosmology from cosmic shear power spectra with Subaru Hyper Suprime-Cam first-year data
- Cosmology with cosmic shear observations: a review
- Shapes and Shears, Stars and Smears: Optimal Measurements for Weak Lensing
- Bayesian Galaxy Shape Measurement for Weak Lensing Surveys - III. Application to the Canada-France-Hawaii Telescope Lensing Survey
- Weak Gravitational Lensing with COSMOS: Galaxy Selection and Shape Measurements
- Weak Gravitational Lensing and its Cosmological Applications
- CFHTLenS: The Canada-France-Hawaii Telescope Lensing Survey - Imaging Data and Catalogue Products
- Shear calibration biases in weak lensing surveys
- Evidence for the accelerated expansion of the Universe from weak lensing tomography with COSMOS
- CFHTLenS: Combined probe cosmological model comparison using 2D weak gravitational lensing
- Cosmological parameter constraints from galaxy-galaxy lensing and galaxy clustering with the SDSS DR7
- The Intrinsic Alignment of Galaxies and its Impact on Weak Gravitational Lensing in an Era of Precision Cosmology
- COSMOS: 3D weak lensing and the growth of structure
- Practical Weak Lensing Shear Measurement with Metacalibration
- The first-year shear catalog of the Subaru Hyper Suprime-Cam SSP Survey
- The Structures of Distant Galaxies I: Galaxy Structures and the Merger Rate to z~3 in the Hubble Ultra-Deep Field
- Dark Energy Survey Year 1 Results: Weak Lensing Shape Catalogues
- Origins of weak lensing systematics, and requirements on future instrumentation (or knowledge of instrumentation)
- A New Shear Estimator for Weak Lensing Observations
- GREAT3 results I: systematic errors in shear estimation and the impact of real galaxy morphology
- Noise bias in weak lensing shape measurements
- Weak lensing shear calibration with simulations of the HSC survey
- The Third Gravitational Lensing Accuracy Testing (GREAT3) Challenge Handbook
- Results of the GREAT08 Challenge: An image analysis competition for cosmological lensing
- Calibration of weak-lensing shear in the Kilo-Degree Survey
- Bayesian Galaxy Shape Measurement for Weak Lensing Surveys -II. Application to Simulations
- Handbook for the GREAT08 Challenge: An image analysis competition for cosmological lensing
- The Role of Galaxy Interactions and Mergers in Star Formation at z<1.3: Mid-Infrared Properties in the Spitzer First Look Survey
- Shape measurement biases from underfitting and ellipticity gradients
- Bayesian Lensing Shear Measurement
- An accurate and practical method for inference of weak gravitational lensing from galaxy images
- Accurate Shear Measurement with Faint Sources
- Limitations of model fitting methods for lensing shear estimation
- Measuring the Cosmic Shear in Fourier Space
- Cosmic Shears Should Not Be Measured In Conventional Ways
- Sérsic galaxy models in weak lensing shape measurement: model bias, noise bias and their interaction
- Approaching the Cramer-Rao Bound in Weak Lensing with PDF Symmetrization
- Testing Shear Recovery with Field Distortion
- Fourier Power Function Shapelets (FPFS) Shear Estimator: Performance on Image Simulations
- The power spectrum of systematics in cosmic shear tomography and the bias on cosmological parameters
- Weak Lensing Study in VOICE Survey II: Shear Bias Calibrations
Cited by in corpus (9)
- First measurement of the characteristic depletion radius of dark matter haloes from weak lensing
- Halo Properties and Mass Functions of Groups/Clusters from the DESI Legacy Imaging Surveys DR9
- KiDS-1000: cross-correlation with Planck cosmic microwave background lensing and intrinsic alignment removal with self-calibration
- DESI Legacy Imaging Surveys Data Release 9: Cosmological Constraints from Galaxy Clustering and Weak Lensing using the Minimal Bias Model
- Shear Measurement with Poorly Resolved Images
- Avoiding the Geometric Boundary Effect in Shear Measurement
- Mitigating the Noise-Source Coupling Effect in Shear Measurement
- Quasi-2D Weak Lensing Cosmological Constraints Using the PDF-SYM method
- Tele-Correlation: Calibrating Shear-Shear Correlation with Real Data