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The Dark Energy Survey: Data Release 1

Abbott, TMC; Abdalla, FB; Allam, S; Amara, A; Annis, J; Asorey, J; Avila, S; ... Scott, A; + view all (2018) The Dark Energy Survey: Data Release 1. Astrophysical Journal: Supplement Series , 239 (2) , Article 18. 10.3847/1538-4365/aae9f0. Green open access

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Abstract

We describe the first public data release of the Dark Energy Survey, DES DR1, consisting of reduced single-epoch images, co-added images, co-added source catalogs, and associated products and services assembled over the first 3 yr of DES science operations. DES DR1 is based on optical/near-infrared imaging from 345 distinct nights (2013 August to 2016 February) by the Dark Energy Camera mounted on the 4 m Blanco telescope at the Cerro Tololo Inter-American Observatory in Chile. We release data from the DES wide-area survey covering ~5000 deg2 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 = 0farcs90 FWHM, a photometric precision of <1% in all bands, and an astrometric precision of 151 $\,\mathrm{mas}$. The median co-added catalog depth for a 1farcs95 diameter aperture at signal-to-noise ratio (S/N) = 10 is g = 24.33, r = 24.08, i = 23.44, z = 22.69, and Y = 21.44 $\,\mathrm{mag}$ . DES DR1 includes nearly 400 million distinct astronomical objects detected in ~10,000 co-add tiles of size 0.534 deg2 produced from ~39,000 individual exposures. Benchmark galaxy and stellar samples contain ~310 million and ~80 million 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 co-add image visualization tool. DES DR1 constitutes the largest photometric data set to date at the achieved depth and photometric precision.

Type: Article
Title: The Dark Energy Survey: Data Release 1
Open access status: An open access version is available from UCL Discovery
DOI: 10.3847/1538-4365/aae9f0
Publisher version: https://doi.org/10.3847/1538-4365/aae9f0
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Science & Technology, Physical Sciences, Astronomy & Astrophysics, astronomical databases: miscellaneous, catalogs, cosmology: observations, surveys, techniques: image processing, techniques: photometric, ANGULAR MASKS, SKY SURVEY, REPRESENTATIONS, SEXTRACTOR, CATALOG
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/10064037
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