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Abbott, T. M. C.; Amon, A.; Avila, S.; Bacon, D.; Banerji, M.; Bernstein, G. M.; Bertin, E.; Bhargava, S.; Bridle, S. L.; Brooks, D.; Burke, D. L.; Carnero Rosell, A.; Carrasco Kind, M.; Carretero, J.; Castander, F. J.; Cawthon, R.; Chang, C.; Conselice, C.; Crocce, M.; De Vicente, J.; DeRose, J.; Desai, S.; Diehl, H. T.; Dietrich, J. P.; Drlica-Wagner, A.; Everett, S.; Evrard, A. E.; Ferté, A.; Fosalba, P.; Friedel, D.; Frieman, J.; García-Bellido, J.; Giannantonio, T.; Gill, M. S. S.; Gruen, D.; Gruendl, R. A.; Gschwend, J.; Gutierrez, G.; Hartley, W. G.; Hinton, S. R.; Hollowood, D. L.; Honscheid, K.; Huterer, D.; Johnson, M. D.; Kent, S.; Kron, R.; Kuropatkin, N.; Lahav, O.; Li, T. S.; Lidman, C.; MacCrann, N.; Manning, T. A.; Maloney, J. D.; March, M.; Marshall, J. L.; Martini, P.; Menanteau, F.; Miquel, R.; Morgan, R.; Myles, J.; Neilsen, E.; Ogando, R. L. C.; Palmese, A.; Paz-Chinchón, F.; Pieres, A.; Pond, C.; Rodriguez-Monroy, M.; Romer, A. K.; Roodman, A.; Rykoff, E. S.; Sako, M.; Santiago, B.; Scarpine, V.; Serrano, S.; Smith, J. Allyn; Soares-Santos, M.; Swanson, M. E. C.; Tarle, G.; Thomas, D.; Tremblay, P. E.; Tucker, D. L.; Turner, D. J.; Varga, T. N.; Wechsler, R. H.; Weller, J.; Wester, W.; Wilkinson, R. D.; Yanny, B.; Fitzpatrick, M.; Jacques, A.; Scott, A.; Huang, L.; Herrera, D.; Juneau, S.; Nidever, D.; Weaver, B. A.; Correia, V.; de Freitas, M.; Freitas, F. N.; Vila-Verde, G.
The Astrophysical journal. Supplement series, 08/2021, Volume: 255, Issue: 2Journal Article
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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