The Dark Energy Survey Data Release 2
Creators: name: DES Collaboration
name: Abbott, T. M. C.
name: Adamow, M.
name: Aguena, M.
name: Allam, S.
name: Amon, A.
name: Annis, J.
name: Avila, S.
name: Bacon, D.
name: Banerji, M.
name: Bechtol, K.
name: Becker, M. R.
name: Bernstein, G. M.
name: Bertin, E.
name: Bhargava, S.
name: Bridle, S. L.
name: Brooks, D.
name: Burke, D. L.
name: Rosell, A. Carnero
name: Kind, M. Carrasco
name: Carretero, J.
name: Castander, F. J.
name: Cawthon, R.
name: Chang, C.
name: Choi, A.
name: Conselice, C.
name: Costanzi, M.
name: Crocce, M.
name: da Costa, L. N.
name: Davis, T. M.
name: De Vicente, J.
name: DeRose, J.
name: Desai, S.
name: Diehl, H. T.
name: Dietrich, J. P.
name: Drlica-Wagner, A.
name: Eckert, K.
name: Elvin-Poole, J.
name: Everett, S.
name: Evrard, A. E.
name: Ferrero, I.
name: Ferté, A.
name: Flaugher, B.
name: Fosalba, P.
name: Friedel, D.
name: Frieman, J.
name: García-Bellido, J.
name: Gelman, L.
name: Gerdes, D. W.
name: Giannantonio, T.
name: Gill, M.
name: Gruen, D.
name: Gruendl, R. A.
name: Gschwend, J.
name: Gutierrez, G.
name: Hartley, W. G.
name: Hinton, S. R.
name: Hollowood, D. L.
name: Honscheid, K.
name: Huterer, D.
name: James, D. J.
name: Jeltema, T.
name: Johnson, M. D.
name: Kent, S.
name: Kron, R.
name: Kuehn, K.
name: Kuropatkin, N.
name: Lahav, O.
name: Li, T. S.
name: Lidman, C.
name: Lin, H.
name: MacCrann, N.
name: Maia, M. A. G.
name: Manning, T.
name: March, M.
name: Marshall, J. L.
name: Martini, P.
name: Melchior, P.
name: Menanteau, F.
name: Miquel, R.
name: Morgan, R.
name: Myles, J.
name: Neilsen, E.
name: Ogando, R. L. C.
name: Palmese, A.
name: Paz-Chinchón, F.
name: Petravick, D.
name: Pieres, A.
name: Plazas, A. A.
name: Pond, C.
name: Rodriguez-Monroy, M.
name: Romer, A. K.
name: Roodman, A.
name: Rykoff, E. S.
name: Sako, M.
name: Sanchez, E.
name: Santiago, B.
name: Serrano, S.
name: Sevilla-Noarbe, I.
name: Smith, J. Allyn.
name: Smith, M.
name: Soares-Santos, M.
name: Suchyta, E.
name: Swanson, M. E. C.
name: Tarle, G.
name: Thomas, D.
name: To, C.
name: Tremblay, P. E.
name: Troxel, M. A.
name: Tucker, D. L.
name: Turner, D. J
name: Varga, T. N.
name: Walker, A. R.
name: Wechsler, R. H.
name: Weller, J.
name: Wester, W.
name: Wilkinson, R. D.
name: Yanny, B.
name: Zhang, Y.
name: Nikutta, R.
name: Fitzpatrick, M.
name: Jacques, A.
name: Scott, A.
name: Olsen, K.
name: Huang, L.
name: Herrera, D.
name: Juneau, S.
name: Nidever, D.
name: Weaver, B. A.
name: Adean, C.
name: Correia, V.
name: de Freitas, M.
name: Freitas, F. N.
name: Singulani, C.
name: Vila-Verde, G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: 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 years of DES science operations. This release includes data from the DES wide-area survey covering ~5000 deg2 of the southern Galactic cap in five broad photometric bands, grizY. DES DR2 has a median delivered point-spread function full-width at half maximum of g= 1.11, r= 0.95, i= 0.88, z= 0.83, and Y= 0.90 arcsec photometric uniformity with a standard deviation of &lt; 3 mmag with respect to Gaia DR2 G-band, a photometric accuracy of ~10 mmag, and a median internal astrometric precision of ~27 mas. The median coadded catalog depth for a 1.95 arcsec diameter aperture at S/N= 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 deg2 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.
description: Accepted version. Copyright AAS. Reproduced with permission. 29 pages, 13 figures. Visit https://des.ncsa.illinois.edu/releases/dr2