The Dark Energy Survey Data Release 1

Abstract

We describe the first public data release of the Dark Energy Survey, DES DR1, consisting of reduced single epoch images, coadded images, coadded source catalogs, and associated products and services assembled over the first three years of DES science operations. DES DR1 is based on optical/near-infrared imaging from 345 distinct nights (August 2013 to February 2016) by the Dark Energy Camera mounted on the 4-m Blanco telescope at Cerro Tololo Inter-American Observatory in Chile. We release data from the DES wide-area survey covering ~5,000 sq. deg. of the southern Galactic cap in five broad photometric bands, grizY. DES DR1 has a median delivered point-spread function of g = 1.12, r = 0.96, i = 0.88, z = 0.84, and Y = 0.90 arcsec FWHM, a photometric precision of < 1% in all bands, and an astrometric precision of 151 mas. The median coadded catalog depth for a 1.95" diameter aperture at S/N = 10 is g = 24.33, r = 24.08, i = 23.44, z = 22.69, and Y = 21.44 mag. DES DR1 includes nearly 400M distinct astronomical objects detected in ~10,000 coadd tiles of size 0.534 sq. deg. produced from ~39,000 individual exposures. Benchmark galaxy and stellar samples contain ~310M and ~ 80M objects, respectively, following a basic object quality selection. These data are accessible through a range of interfaces, including query web clients, image cutout servers, jupyter notebooks, and an interactive coadd image visualization tool. DES DR1 constitutes the largest photometric data set to date at the achieved depth and photometric precision.

30 pages, 20 Figures. Release page found at this url https://des.ncsa.illinois.edu/releases/dr1

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• Multiwavelength survey of X-ray sources in the Sculptor Dwarf Spheroidal Galaxy
• Some physical properties of a new Jupiter-family comet P/2019 LD2 (ATLAS) from broadband observations
• Star-Galaxy Separation via Gaussian Processes with Model Reduction
• Low-Energy Electron-Track Imaging for a Liquid Argon Time-Projection-Chamber Telescope Concept using Probabilistic Deep Learning
• Galaxies OBserved as Low-luminosity Identified Nebulae (GOBLIN): a catalog of 43,000 high-probability dwarf galaxy candidates in the UNIONS survey
• Reconstructing redshift distributions with photometric galaxy clustering
• Dark Energy Survey Year 6 Results: Intra-Cluster Light from Redshift 0.2 to 0.5
• SDSS J125417.98+274004.6: An X-ray Detected Minor Merger Dual AGN
• AGN in the ULIRG HE 0435-5304
• Dark Matter and Fundamental Physics Searches with IACTs
• Z-Sequence: Photometric redshift predictions for galaxy clusters with sequential random k-nearest neighbours
• Evolution of Cluster Alignments as Evidence of Large-scale Structure Formation in the Universe
• Evidence for Color Dichotomy in the Primordial Neptunian Trojan Population
• Search for Ultraviolet Luminous Objects in GALEX data
• Search of nearby resolved neutron stars among optical sources
• Timing Mass of the Local Group
• Evaluating the Accuracy of Non-parametric Galaxy Morphological Indicator Measurements in the CSST Imaging Survey
• Deep inference of simulated strong lenses in ground-based surveys
• Addressing type Ia supernova color variability with a linear spectral template
• The case for a 'sub-millimeter SDSS': a 3D map of galaxy evolution to z~10
• Biased Moments of Undersampled Sources
• Constraining the shape of Milky Way satellites with distance gradients