First Cosmology Results Using Type Ia Supernovae from the Dark Energy Survey: Effects of Chromatic Corrections to Supernova Photometry on Measurements of Cosmological Parameters

Abstract

Calibration uncertainties have been the leading systematic uncertainty in recent analyses using type Ia Supernovae (SNe Ia) to measure cosmological parameters. To improve the calibration, we present the application of Spectral Energy Distribution (SED)-dependent "chromatic corrections" to the supernova light-curve photometry from the Dark Energy Survey (DES). These corrections depend on the combined atmospheric and instrumental transmission function for each exposure, and they affect photometry at the 0.01 mag (1%) level, comparable to systematic uncertainties in calibration and photometry. Fitting our combined DES and low-z SN Ia sample with Baryon Acoustic Oscillation (BAO) and Cosmic Microwave Background (CMB) priors for the cosmological parameters ${\Omega }_{\mathrm{m}}$ (the fraction of the critical density of the universe comprised of matter) and w (the dark energy equation of state parameter), we compare those parameters before and after applying the corrections. We find the change in w and ${\Omega }_{\mathrm{m}}$ due to not including chromatic corrections are -0.002 and 0.000, respectively, for the DES-SN3YR sample with BAO and CMB priors, consistent with a larger DES-SN3YR-like simulation, which has a w-change of 0.0005 with an uncertainty of 0.008 and an ${\Omega }_{\mathrm{m}}$ change of 0.000 with an uncertainty of 0.002 . However, when considering samples on individual CCDs we find large redshift-dependent biases (approximately 0.02 in distance modulus) for supernova distances.

arXiv comment17 pages, 12 figures, submitted to MNRAS

References in corpus (44)

• The Sloan Digital Sky Survey: Technical Summary
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
• The Complete Light-curve Sample of Spectroscopically Confirmed Type Ia Supernovae from Pan-STARRS1 and Cosmological Constraints from The Combined Pantheon Sample
• The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda and w from the First Year Data Set
• Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples
• New Hubble Space Telescope Discoveries of Type Ia Supernovae at z > 1: Narrowing Constraints on the Early Behavior of Dark Energy
• The Hubble Space Telescope Cluster Supernova Survey: V. Improving the Dark Energy Constraints Above z>1 and Building an Early-Type-Hosted Supernova Sample
• The Dark Energy Camera
• The Pan-STARRS1 Photometric System
• Supernova Constraints and Systematic Uncertainties from the First 3 Years of the Supernova Legacy Survey
• SALT2: using distant supernovae to improve the use of Type Ia supernovae as distance indicators
• The Supernova Legacy Survey 3-year sample: Type Ia Supernovae photometric distances and cosmological constraints
• CfA3: 185 Type Ia Supernova Light Curves from the CfA
• Photometric Calibration of the First 1.5 Years of the Pan-STARRS1 Survey
• K-corrections and spectral templates of Type Ia supernovae
• Cosmological Constraints from Measurements of Type Ia Supernovae discovered during the first 1.5 years of the Pan-STARRS1 Survey
• The Pan-STARRS 1 Photometric Reference Ladder, Release 12.0
• SNANA: A Public Software Package for Supernova Analysis
• The Carnegie Supernova Project: Second Photometry Data Release of Low-Redshift Type Ia Supernovae
• First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters
• Correcting Type Ia Supernova Distances for Selection Biases and Contamination in Photometrically Identified Samples
• CfA4: Light Curves for 94 Type Ia Supernovae
• Techniques and Review of Absolute Flux Calibration from the Ultraviolet to the Mid-Infrared
• The Data Release of the Sloan Digital Sky Survey-II Supernova Survey
• The Sloan Digital Sky Survey-II: Photometry and Supernova Ia Light Curves from the 2005 data
• Simulations of the WFIRST Supernova Survey and Forecasts of Cosmological Constraints
• Type Ia Supernova Rate Measurements to Redshift 2.5 from CANDELS : Searching for Prompt Explosions in the Early Universe
• Supernova Simulations and Strategies For the Dark Energy Survey
• The Difference Imaging Pipeline for the Transient Search in the Dark Energy Survey
• Supercal: Cross-Calibration of Multiple Photometric Systems to Improve Cosmological Measurements with Type Ia Supernovae
• Photometric Calibration of the Supernova Legacy Survey Fields
• Hypercalibration: A Pan-STARRS1-based recalibration of the Sloan Digital Sky Survey
• Measuring Type Ia Supernova Populations of Stretch and Color and Predicting Distance Biases
• Forward Global Photometric Calibration of the Dark Energy Survey
• Host Galaxy Identification for Supernova Surveys
• First Cosmology Results using Type Ia Supernova from the Dark Energy Survey: Simulations to Correct Supernova Distance Biases
• Testing Models of Intrinsic Brightness Variations in Type Ia Supernovae, and their Impact on Measuring Cosmological Parameters
• Evolution in the Volumetric Type Ia Supernova Rate from the Supernova Legacy Survey
• Cosmological Parameter Uncertainties from SALT-II Type Ia Supernova Light Curve Models
• Assessment of Systematic Chromatic Errors that Impact Sub-1% Photometric Precision in Large-Area Sky Surveys
• Measuring NIR Atmospheric Extinction Using a Global Positioning System Receiver
• An Improved Photometric Calibration of the Sloan Digital Sky Survey Imaging Data

Cited by in corpus (16)

• Dark Energy Survey Year 3 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
• First Cosmological Results using Type Ia Supernovae from the Dark Energy Survey: Measurement of the Hubble Constant
• Dark Energy Survey Year 3 Results: Photometric Data Set for Cosmology
• First Cosmology Results Using Type Ia Supernovae From the Dark Energy Survey: Analysis, Systematic Uncertainties, and Validation
• First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: The Effect of Host Galaxy Properties on Supernova Luminosity
• Supernova Host Galaxies in the Dark Energy Survey: I. Deep Coadds, Photometry, and Stellar Masses
• Cosmological Results from the RAISIN Survey: Using Type Ia Supernovae in the Near Infrared as a Novel Path to Measure the Dark Energy Equation of State
• First Cosmology Results Using Type Ia Supernovae From the Dark Energy Survey: Survey Overview and Supernova Spectroscopy
• The Dark Energy Survey Supernova Program: Modelling selection efficiency and observed core collapse supernova contamination
• The Dark Energy Survey: Cosmology Results With ~1500 New High-redshift Type Ia Supernovae Using The Full 5-year Dataset
• DES Y1 results: Splitting growth and geometry to test $\Lambda$CDM
• The Dark Energy Survey Supernova Program: Cosmological Analysis and Systematic Uncertainties
• Photometric Supernovae Redshift Systematics Requirements
• Assessment of the Systematic Uncertainties in the Cosmological Analysis of the SDSS Supernovae Photometric Sample
• The Dark Energy Survey Supernova Program: Corrections on photometry due to wavelength-dependent atmospheric effects
• Weak Lensing of Type Ia Supernovae from the Dark Energy Survey