Dark Energy Survey Year 1 Results: Photometric Data Set for Cosmology

Abstract

We describe the creation, content, and validation of the Dark Energy Survey (DES) internal year-one cosmology data set, Y1A1 GOLD, in support of upcoming cosmological analyses. The Y1A1 GOLD data set is assembled from multiple epochs of DES imaging and consists of calibrated photometric zeropoints, object catalogs, and ancillary data products - e.g., maps of survey depth and observing conditions, star-galaxy classification, and photometric redshift estimates - that are necessary for accurate cosmological analyses. The Y1A1 GOLD wide-area object catalog consists of ~137 million objects detected in coadded images covering ~1800 deg${}^2$ in the DES grizY filters. The 10σ limiting magnitude for galaxies is g = 23.4, r = 23.2, i = 22.5, z = 21.8, and Y = 20.1. Photometric calibration of Y1A1 GOLD was performed by combining nightly zeropoint solutions with stellar-locus regression, and the absolute calibration accuracy is better than 2% over the survey area. DES Y1A1 GOLD is the largest photometric data set at the achieved depth to date, enabling precise measurements of cosmic acceleration at z $\lesssim$ 1.

arXiv comment43 pages, 28 figures, 8 tables; updated to match published version

References in corpus (69)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• Astropy: A Community Python Package for Astronomy
• The NumPy array: a structure for efficient numerical computation
• HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
• The UKIRT Infrared Deep Sky Survey (UKIDSS)
• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• The Cosmic Evolution Survey (COSMOS) -- Overview
• The Great Observatories Origins Deep Survey: Initial Results From Optical and Near-Infrared Imaging
• The u'g'r'i'z' Standard Star Network
• The Ninth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Baryon Oscillation Spectroscopic Survey
• Bayesian photometric redshift estimation
• The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)
• The COSMOS2015 Catalog: Exploring the 1<z<6 Universe with half a million galaxies
• The Dark Energy Camera
• The Dark Energy Survey: more than dark energy - an overview
• The UKIRT Infrared Deep Sky Survey ZYJHK Photometric System: Passbands and Synthetic Colours
• CFHTLenS: The Canada-France-Hawaii Telescope Lensing Survey
• The 10 Meter South Pole Telescope
• Eight New Milky Way Companions Discovered in First-Year Dark Energy Survey Data
• Eight Ultra-faint Galaxy Candidates Discovered in Year Two of the Dark Energy Survey
• The WFCAM Science Archive
• SDSS Data Management and Photometric Quality Assessment
• Weak Gravitational Lensing with COSMOS: Galaxy Selection and Shape Measurements
• The UKIRT Wide Field Camera ZYJHK Photometric System: Calibration from 2MASS
• CFHTLenS: The Canada-France-Hawaii Telescope Lensing Survey - Imaging Data and Catalogue Products
• Percolation Galaxy Groups and Clusters in the SDSS Redshift Survey: Identification, Catalogs, and the Multiplicity Function
• The Sloan Digital Sky Survey Monitor Telescope Pipeline
• CFHTLenS: Improving the quality of photometric redshifts with precision photometry
• Calibrating Redshift Distributions Beyond Spectroscopic Limits with Cross-Correlations
• Practical Weak Lensing Shear Measurement with Metacalibration
• The Blanco Cosmology Survey: Data Acquisition, Processing, Calibration, Quality Diagnostics and Data Release
• Techniques and Review of Absolute Flux Calibration from the Ultraviolet to the Mid-Infrared
• redMaGiC: Selecting Luminous Red Galaxies from the DES Science Verification Data
• The SDSS Coadd: 275 deg^2 of Deep SDSS Imaging on Stripe 82
• The DES Science Verification Weak Lensing Shear Catalogues
• Methods for Rapidly Processing Angular Masks of Next-Generation Galaxy Surveys
• Simultaneous Multicolor Detection of Faint Galaxies in the Hubble Deep Field
• Galaxy clustering in the CFHTLS-Wide: the changing relationship between galaxies and haloes since z ~ 1.2
• The Difference Imaging Pipeline for the Transient Search in the Dark Energy Survey
• The brighter-fatter effect and pixel correlations in CCD sensors
• Redshift distributions of galaxies in the DES Science Verification shear catalogue and implications for weak lensing
• The Red-sequence Cluster Survey-2 (RCS-2): survey details and photometric catalog construction
• DNF - Galaxy photometric redshift by Directional Neighbourhood Fitting
• Cosmic Voids and Void Lensing in the Dark Energy Survey Science Verification Data
• A scheme to deal accurately and efficiently with complex angular masks in galaxy surveys
• Stellar Locus Regression: Accurate Color Calibration, and the Real-time Determination of Galaxy Cluster Photometric Redshifts
• An imaging K-band survey - I: The catalogue, star and galaxy counts
• No galaxy left behind: accurate measurements with the faintest objects in the Dark Energy Survey
• Recovering Redshift Distributions with Cross-Correlations: Pushing The Boundaries
• Dynamical Analysis of Nearby ClustErs. Automated astrometry from the ground: precision proper motions over wide field
• Weighing the Giants II: Improved Calibration of Photometry from Stellar Colors and Accurate Photometric Redshifts
• Characterization and correction of charge-induced pixel shifts in DECam
• The Dark Energy Survey Data Processing and Calibration System
• An Implementation of Bayesian Lensing Shear Measurement
• Star/galaxy separation at faint magnitudes: Application to a simulated Dark Energy Survey
• Astrometric calibration and performance of the Dark Energy Camera
• Mapping and simulating systematics due to spatially-varying observing conditions in DES Science Verification data
• Star-Galaxy Classification in Multi-Band Optical Imaging
• Galaxy Populations in Massive Galaxy Clusters to z=1.1: Color Distribution, Concentration, Halo Occupation Number and Red Sequence Fraction
• Modelling the Transfer Function for the Dark Energy Survey
• What Lies Beneath: Using p(z) to Reduce Systematic Photometric Redshift Errors
• Replacing standard galaxy profiles with mixtures of Gaussians
• The Oxford-Dartmouth Thirty Degree Survey I: Observations and Calibration of a Wide-Field Multi-Band Survey
• Assessment of Systematic Chromatic Errors that Impact Sub-1% Photometric Precision in Large-Area Sky Surveys
• On-sky measurements of the transverse electric fields' effects in the Dark Energy Camera CCDs
• The Dark Energy Survey Data Management System
• Cyber-infrastructure to Support Science and Data Management for the Dark Energy Survey
• Crowdsourcing quality control for Dark Energy Survey images
• Crowded Cluster Cores: Algorithms for Deblending in Dark Energy Survey Images

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