Characterizing and Propagating Modeling Uncertainties in Photometrically-Derived Redshift Distributions
arXiv:1011.2239 · doi:10.1088/0004-637X/734/1/36
Abstract
The uncertainty in the redshift distributions of galaxies has a significant potential impact on the cosmological parameter values inferred from multi-band imaging surveys. The accuracy of the photometric redshifts measured in these surveys depends not only on the quality of the flux data, but also on a number of modeling assumptions that enter into both the training set and SED fitting methods of photometric redshift estimation. In this work we focus on the latter, considering two types of modeling uncertainties: uncertainties in the SED template set and uncertainties in the magnitude and type priors used in a Bayesian photometric redshift estimation method. We find that SED template selection effects dominate over magnitude prior errors. We introduce a method for parameterizing the resulting ignorance of the redshift distributions, and for propagating these uncertainties to uncertainties in cosmological parameters.
13 pages, 12 figures, version published in ApJ
References in corpus (37)
- Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
- Measurements of Omega and Lambda from 42 High-Redshift Supernovae
- EAZY: A Fast, Public Photometric Redshift Code
- The Great Observatories Origins Deep Survey: Initial Results From Optical and Near-Infrared Imaging
- COSMOS Photometric Redshifts with 30-bands for 2-deg2
- Bayesian photometric redshift estimation
- Dark energy constraints from cosmic shear power spectra: impact of intrinsic alignments on photometric redshift requirements
- Power Spectrum Tomography with Weak Lensing
- Systematic Errors in Future Weak Lensing Surveys: Requirements and Prospects for Self-Calibration
- Cosmological parameters from lensing power spectrum and bispectrum tomography
- Slicing Through Multicolor Space: Galaxy Redshifts From Broadband Photometry
- Low Resolution Spectral Templates For AGNs and Galaxies From 0.03 -- 30 microns
- Effect of Photometric Redshift Uncertainties on Weak Lensing Tomography
- PHAT: PHoto-z Accuracy Testing
- Systematic Bias in Cosmic Shear: Beyond the Fisher Matrix
- Calibrating the Nonlinear Matter Power Spectrum: Requirements for Future Weak Lensing Surveys
- Estimating the Redshift Distribution of Photometric Galaxy Samples II. Applications and Tests of a New Method
- Precision photometric redshift calibration for galaxy-galaxy weak lensing
- Catastrophic photometric redshift errors: weak lensing survey requirements
- Spectral Templates from Multicolor Redshift Surveys
- Creating Spectral Templates from Multicolor Redshift Surveys
- Photo-z for weak lensing tomography from space: the role of optical and near-IR photometry
- Using Galaxy Two-point Correlation Functions to Determine the Redshift Distributions of Galaxies Binned by Photometric Redshift
- Reconstructing Redshift Distributions with Cross-Correlations: Tests and an Optimized Recipe
- Weak lensing, dark matter and dark energy
- A General Study of the Influence of Catastrophic Photometric Redshift Errors on Cosmology with Cosmic Shear Tomography
- Low Resolution Spectral Templates For Galaxies From 0.2 -- 10 microns
- Cosmic tomographies: baryon acoustic oscillations and weak lensing
- Error analysis of the photometric redshift tecnique
- What Lies Beneath: Using p(z) to Reduce Systematic Photometric Redshift Errors
- Size of spectroscopic calibration samples for cosmic shear photometric redshifts
- Photo-z Performance for Precision Cosmology
- Constraining Cosmology with High Convergence Regions in Weak Lensing Surveys
- Catastrophic Photo-z Errors and the Dark Energy Parameter Estimates with Cosmic Shear
- Photometric Redshift Biases from Galaxy Evolution
- A Clipping Method to Mitigate the Impact of Catastrophic Photometric Redshift Errors on Weak Lensing Tomography
- Bayesian Photometric Redshifts for Weak Lensing Applications
Cited by in corpus (20)
- The ALHAMBRA Survey: Bayesian Photometric Redshifts with 23 bands for 3 squared degrees
- Cosmic Shear Results from the Deep Lens Survey - II: Full Cosmological Parameter Constraints from Tomography
- Spectroscopic Needs for Imaging Dark Energy Experiments: Photometric Redshift Training and Calibration
- Weighing the Giants II: Improved Calibration of Photometry from Stellar Colors and Accurate Photometric Redshifts
- Cosmology with the Large Synoptic Survey Telescope: an Overview
- CFHTLenS and RCSLenS: Testing Photometric Redshift Distributions Using Angular Cross-Correlations with Spectroscopic Galaxy Surveys
- Photometric Redshift Probability Distributions for Galaxies in the SDSS DR8
- Sample variance in photometric redshift calibration: cosmological biases and survey requirements
- Young Galaxy Candidates in the Hubble Frontier Fields. II. MACS,J0416-2403
- A Catalog of AGN Host Galaxies Observed with HST/ACS: Correlations between Star Formation and AGN Activity
- Spectroscopic failures in photometric redshift calibration: cosmological biases and survey requirements
- A Comprehensive Bayesian Discrimination of the Simple Stellar Population Model, Star Formation History and Dust Attenuation Law in the Spectral Energy Distribution Modeling of Galaxies
- J-PLUS: On the identification of new cluster members in the double galaxy cluster A2589 & A2593 using PDFs
- Improved Photometric Redshifts via Enhanced Estimates of System Response, Galaxy Templates, and Magnitude Priors
- Photometric redshifts with machine learning, lights and shadows on a complex data science use case
- Assessing the photometric redshift precision of the S-PLUS survey: the Stripe-82 as a test-case
- Sparse Representation of Photometric Redshift PDFs: Preparing for Petascale Astronomy
- Photometric Redshift Estimation with Galaxy Morphology using Self-Organizing Maps
- Impact of photometric redshifts on the galaxy power spectrum and BAO scale in the LSST survey
- Gravitational corrections to light propagation in a perturbed FLRW-universe and corresponding weak lensing spectra