Analytical Noise Bias Correction for Weak Lensing Shear Analysis with ERA
arXiv:1802.02448 · doi:10.1093/mnras/sty1746
Abstract
Highly precise weak lensing shear measurement is required for statistical weak gravitational lensing analysis such as cosmic shear measurement to achieve severe constraint on the cosmological parameters. For this purpose, the accurate shape measurement of background galaxies is absolutely important in which any systematic error in the measurement should be carefully corrected. One of the main systematic error comes from photon noise which is Poisson noise of flux from the atmosphere(noise bias). We investigate how the photon noise makes a systematic error in shear measurement within the framework of ERA method we developed in earlier papers and gives a practical correction method. The method is tested by simulations with real galaxy images with various conditions and it is confirmed that it can correct of the noise bias except for galaxies with very low signal to noise ratio.
arXiv commentsubmitted to MNRAS. arXiv admin note: substantial text overlap with arXiv:1706.03903
References in corpus (38)
- A Method for Weak Lensing Observations
- Detection of Weak Gravitational Lensing by Large-scale Structure
- Shapes and Shears, Stars and Smears: Optimal Measurements for Weak Lensing
- The Shear TEsting Programme 1: Weak lensing analysis of simulated ground-based observations
- Probing the Universe with Weak Lensing
- The Shear TEsting Programme 2: Factors affecting high precision weak lensing analyses
- Shear calibration biases in weak lensing surveys
- Cosmology with Weak Lensing Surveys
- First cosmic shear results from the Canada-France-Hawaii Telescope Wide Synoptic Legacy Survey
- Practical Weak Lensing Shear Measurement with Metacalibration
- Bayesian Galaxy Shape Measurement for Weak Lensing Surveys -I. Methodology and a Fast Fitting Algorithm
- The DES Science Verification Weak Lensing Shear Catalogues
- Noise bias in weak lensing shape measurements
- Image Analysis for Cosmology: Results from the GREAT10 Galaxy Challenge
- Results of the GREAT08 Challenge: An image analysis competition for cosmological lensing
- Calibration of weak-lensing shear in the Kilo-Degree Survey
- Joint Cosmic Shear Measurements with the Keck and William Herschel Telescopes
- Means of confusion: how pixel noise affects shear estimates for weak gravitational lensing
- Cosmic Shear Analysis in 50 Uncorrelated VLT Fields. Implications for Omega_0, sigma_8
- Dealing with systematics in cosmic shear studies: new results from the VIRMOS-Descart Survey
- Metacalibration: Direct Self-Calibration of Biases in Shear Measurement
- Cosmic shear statistics in the Suprime-Cam 2.1 sq deg field: Constraints on Omega_m and sigma_8
- Cosmic Shear and Power Spectrum Normalization with the Hubble Space Telescope
- Measurement and Calibration of Noise Bias in Weak Lensing Galaxy Shape Estimation
- Bayesian Lensing Shear Measurement
- A study of the sensitivity of shape measurements to the input parameters of weak lensing image simulations
- An accurate and practical method for inference of weak gravitational lensing from galaxy images
- Elliptical Weighted HOLICs for Weak Lensing Shear Measurement part2:PSF correction and application to Abell 370
- Weak-lensing shear estimates with general adaptive moments, and studies of bias by pixellation, PSF distortions, and noise
- Elliptical Weighted HOLICs for Weak Lensing Shear Measurement. part1:Definitions and isotropic PSF correction
- Cosmic Gravitational Shear from the HST Medium Deep Survey
- Elliptical Weighted HOLICs for Weak Lensing Shear Measurement part3:Random Count Noise Effect for Image's Moments in Weak Lensing Analysis
- Shear Nulling after PSF Gaussianisation: moment-based weak lensing measurements with subpercent noise bias
- The systematic error test for PSF correction in weak gravitational lensing shear measurement by The ERA Method by Idealizing PSF
- Cosmic shear measurement with maximum likelihood and maximum a posteriori inference
- A New Method for PSF correction using the Ellipticity of Re-smeared Artificial Images in Weak Gravitational Lensing Shear Analysis
- A new weak lensing shear analysis method using ellipticity defined by 0th order moments
- Cosmic Shear Measurement using Autoconvolved Images
Cited by in corpus (5)
- The galaxy cluster mass scale and its impact on cosmological constraints from the cluster population
- Fourier Power Function Shapelets (FPFS) Shear Estimator: Performance on Image Simulations
- Effects of overlapping sources on cosmic shear estimation: Statistical sensitivity and pixel-noise bias
- Simulating image coaddition with the Nancy Grace Roman Space Telescope: II. Analysis of the simulated images and implications for weak lensing
- New highly precise weak gravitational lensing flexions measurement method based on ERA method