The Dark Energy Survey Data Release 2
T. M. C. AbbottCerro Tololo Inter-American Observatory, NSF's National Optical-Infrared Astronomy Research Laboratory, Casilla 603, La Serena, ChileM. AdamówCenter for Astrophysical Surveys, National Center for Supercomputing Applications, 1205 West Clark Street, Urbana, IL 61801, USA; [email protected]M. AguenaLaboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, Brazil; [email protected]S. AllamFermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USAA. AmonStanford UniversityJ. AnnisFermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USAS. AvilaInstituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid, E-28049 Madrid, SpainD. BaconInstitute of Cosmology and Gravitation, University of Portsmouth, Portsmouth, PO1 3FX, UKM. BanerjiInstitute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0HA, UKK. BechtolPhysics Department, 2320 Chamberlin Hall, University of Wisconsin-Madison, 1150 University Avenue, Madison, WI 53706-1390, USA; [email protected]M. R. BeckerArgonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439, USAG. M. BernsteinDepartment of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USAE. BertinSorbonne UniversitéS. BhargavaDepartment of Physics and Astronomy, Pevensey Building, University of Sussex, Brighton, BN1 9QH, UKSarah BridleJodrell Bank Center for Astrophysics, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester, M13 9PL, UKDavid BrooksDepartment of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UKD. L. BurkeSLAC National Accelerator Laboratory, Menlo Park, CA 94025, USAA. Carnero RosellInstituto de Astrofísica de Canarias, E-38205 La Laguna, Tenerife, SpainM. Carrasco KindDepartment of Astronomy, University of Illinois at Urbana-Champaign, 1002 W. Green Street, Urbana, IL 61801, USAJ. CarreteroInstitut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra (Barcelona) SpainF. J. CastanderInstitut d’Estudis Espacials de Catalunya (IEEC), E-08034 Barcelona, SpainR. CawthonPhysics Department, 2320 Chamberlin Hall, University of Wisconsin-Madison, 1150 University Avenue, Madison, WI 53706-1390, USA; [email protected]C. ChangDepartment of Astronomy and Astrophysics, University of Chicago, Chicago, IL 60637, USAA. ChoiCenter for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210, USAChristopher J. ConseliceJodrell Bank Center for Astrophysics, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester, M13 9PL, UKM. CostanziINAF-Osservatorio Astronomico di Trieste, via G.B. Tiepolo 11, I-34143 Trieste, ItalyM. CrocceInstitut d’Estudis Espacials de Catalunya (IEEC), E-08034 Barcelona, SpainL. N. da CostaObservatório Nacional, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, BrazilT. M. DavisSchool of Mathematics and Physics, University of Queensland, Brisbane, QLD 4072, AustraliaJ. De VicenteCentro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, SpainJ. DeRoseDepartment of Astronomy, University of California, Berkeley, 501 Campbell Hall, Berkeley, CA 94720, USAS. DesaiDepartment of Physics, IIT Hyderabad, Kandi, Telangana 502285, IndiaH. T. DiehlFermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USAJ. P. DietrichFaculty of Physics, Ludwig-Maximilians-Universität, Scheinerstr. 1, D-81679 Munich, GermanyA. Drlica-WagnerFermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USAK. EckertDepartment of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USAJ. Elvin-PooleCenter for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210, USAS. EverettA. E. EvrardDepartment of Astronomy, University of Michigan, Ann Arbor, MI 48109, USAI. FerreroInstitute of Theoretical Astrophysics, University of Oslo, P.O. Box 1029 Blindern, NO-0315 Oslo, NorwayA. FertéJet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USAB. FlaugherFermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USAP. FosalbaInstitut d’Estudis Espacials de Catalunya (IEEC), E-08034 Barcelona, SpainD. N. FriedelCenter for Astrophysical Surveys, National Center for Supercomputing Applications, 1205 West Clark Street, Urbana, IL 61801, USA; [email protected]J. FriemanKavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USAJ. García-BellidoInstituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid, E-28049 Madrid, SpainE. GaztañagaInstitute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, s/n, E-08193 Barcelona, SpainL. GelmanCenter for Astrophysical Surveys, National Center for Supercomputing Applications, 1205 West Clark Street, Urbana, IL 61801, USA; [email protected]D. W. GerdesDepartment of Astronomy, University of Michigan, Ann Arbor, MI 48109, USAT. GiannantonioInstitute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0HA, UKM. S. S. GillSLAC National Accelerator Laboratory, Menlo Park, CA 94025, USAD. GruenKavli Institute for Particle Astrophysics & Cosmology, P.O. Box 2450, Stanford University, Stanford, CA 94305, USAR. A. GruendlCenter for Astrophysical Surveys, National Center for Supercomputing Applications, 1205 West Clark Street, Urbana, IL 61801, USA; [email protected]J. GschwendLaboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, Brazil; [email protected]G. GutiérrezFermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USAW. G. HartleyDepartment of Astronomy, University of Geneva, ch. d’Ecogia 16, CH-1290 Versoix, SwitzerlandS. R. HintonSchool of Mathematics and Physics, University of Queensland, Brisbane, QLD 4072, AustraliaD. L. HollowoodK. HonscheidCenter for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210, USADragan HutererDepartment of Physics, University of Michigan, Ann Arbor, MI 48109, USAD. J. JamesCenter for Astrophysics ∣ Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USAT. JeltemaM. D. JohnsonCenter for Astrophysical Surveys, National Center for Supercomputing Applications, 1205 West Clark Street, Urbana, IL 61801, USA; [email protected]S. KentFermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USAR. KronDepartment of Astronomy and Astrophysics, University of Chicago, Chicago, IL 60637, USAK. KuehnMacquarie UniversityN. KuropatkinFermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USAO. LahavDepartment of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UKTing S. LiObservatories of the Carnegie Institution for Science, 813 Santa Barbara Street, Pasadena, CA 91101, USAC. LidmanCentre for Gravitational Astrophysics, College of Science, The Australian National University, ACT 2601, AustraliaH. LinFermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USAN. MacCrannDepartment of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge, CB3 0WA, UKM. A. G. MaiaObservatório Nacional, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, BrazilT. A. ManningCenter for Astrophysical Surveys, National Center for Supercomputing Applications, 1205 West Clark Street, Urbana, IL 61801, USA; [email protected]J. D. MaloneyCenter for Astrophysical Surveys, National Center for Supercomputing Applications, 1205 West Clark Street, Urbana, IL 61801, USA; [email protected]M. MarchDepartment of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USAJ. L. MarshallGeorge P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, and Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843, USAPaul MartiniRadcliffe Institute for Advanced Study, Harvard University, Cambridge, MA 02138, USAP. MelchiorDepartment of Astrophysical Sciences, Princeton University, Peyton Hall, Princeton, NJ 08544, USAF. MenanteauDepartment of Astronomy, University of Illinois at Urbana-Champaign, 1002 W. Green Street, Urbana, IL 61801, USAR. MiquelInstitució Catalana de Recerca i Estudis Avançats, E-08010 Barcelona, SpainR. MorganPhysics Department, 2320 Chamberlin Hall, University of Wisconsin-Madison, 1150 University Avenue, Madison, WI 53706-1390, USA; [email protected]J. MylesSLAC National Accelerator Laboratory, Menlo Park, CA 94025, USAEric H. NeilsenFermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USAR. L. C. OgandoLaboratório Interinstitucional de e-AstronomiaA. PalmeseFermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USAF. Paz-ChinchónCenter for Astrophysical Surveys, National Center for Supercomputing Applications, 1205 West Clark Street, Urbana, IL 61801, USA; [email protected]D. PetravickCenter for Astrophysical Surveys, National Center for Supercomputing Applications, 1205 West Clark Street, Urbana, IL 61801, USA; [email protected]A. PieresLaboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, Brazil; [email protected]A. A. PlazasDepartment of Astrophysical Sciences, Princeton University, Peyton Hall, Princeton, NJ 08544, USAC. PondCenter for Astrophysical Surveys, National Center for Supercomputing Applications, 1205 West Clark Street, Urbana, IL 61801, USA; [email protected]M. Rodriguez-MonroyCentro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, SpainKathy RomerDepartment of Physics and Astronomy, Pevensey Building, University of Sussex, Brighton, BN1 9QH, UKA. RoodmanKavli Institute for Particle Astrophysics & Cosmology, P.O. Box 2450, Stanford University, Stanford, CA 94305, USAE. S. RykoffStanford UniversityM. ŠakoDepartment of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USAE. SánchezCentro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, SpainB. SantiagoInstituto de Física, UFRGS, Caixa Postal 15051, Porto Alegre, RS - 91501-970, BrazilV. ScarpineFermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USAS. SerranoInstitute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, s/n, E-08193 Barcelona, Spain
2021en
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Abstract We present the second public data release of the Dark Energy Survey, DES DR2, based on optical/near-infrared imaging by the Dark Energy Camera mounted on the 4 m Blanco telescope at Cerro Tololo Inter-American Observatory in Chile. DES DR2 consists of reduced single-epoch and coadded images, a source catalog derived from coadded images, and associated data products assembled from 6 yr of DES science operations. This release includes data from the DES wide-area survey covering ∼5000 deg 2 of the southern Galactic cap in five broad photometric bands, grizY . DES DR2 has a median delivered point-spread function FWHM of g = 1.11″, r = 0.95″, i = 0.88″, z = 0.83″, and Y = 0.″90, photometric uniformity with a standard deviation of < 3 mmag with respect to Gaia DR2 G band, a photometric accuracy of ∼11 mmag, and a median internal astrometric precision of ∼27 mas. The median coadded catalog depth for a 1.″95 diameter aperture at signal-to-noise ratio = 10 is g = 24.7, r = 24.4, i = 23.8, z = 23.1, and Y = 21.7 mag. DES DR2 includes ∼691 million distinct astronomical objects detected in 10,169 coadded image tiles of size 0.534 deg 2 produced from 76,217 single-epoch images. After a basic quality selection, benchmark galaxy and stellar samples contain 543 million and 145 million objects, respectively. These data are accessible through several interfaces, including interactive image visualization tools, web-based query clients, image cutout servers, and Jupyter notebooks. DES DR2 constitutes the largest photometric data set to date at the achieved depth and photometric precision.
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