학술논문
The Dark Energy Survey Data Release 2
Document Type
Working Paper
Author
DES Collaboration; Abbott, T. M. C.; Adamow, M.; Aguena, M.; Allam, S.; Amon, A.; Annis, J.; Avila, S.; Bacon, D.; Banerji, M.; Bechtol, K.; Becker, M. R.; Bernstein, G. M.; Bertin, E.; Bhargava, S.; Bridle, S. L.; Brooks, D.; Burke, D. L.; Rosell, A. Carnero; Kind, M. Carrasco; Carretero, J.; Castander, F. J.; Cawthon, R.; Chang, C.; Choi, A.; Conselice, C.; Costanzi, M.; Crocce, M.; da Costa, L. N.; Davis, T. M.; De Vicente, J.; DeRose, J.; Desai, S.; Diehl, H. T.; Dietrich, J. P.; Drlica-Wagner, A.; Eckert, K.; Elvin-Poole, J.; Everett, S.; Evrard, A. E.; Ferrero, I.; Ferté, A.; Flaugher, B.; Fosalba, P.; Friedel, D.; Frieman, J.; García-Bellido, J.; Gelman, L.; Gerdes, D. W.; Giannantonio, T.; Gill, M.; Gruen, D.; Gruendl, R. A.; Gschwend, J.; Gutierrez, G.; Hartley, W. G.; Hinton, S. R.; Hollowood, D. L.; Honscheid, K.; Huterer, D.; James, D. J.; Jeltema, T.; Johnson, M. D.; Kent, S.; Kron, R.; Kuehn, K.; Kuropatkin, N.; Lahav, O.; Li, T. S.; Lidman, C.; Lin, H.; MacCrann, N.; Maia, M. A. G.; Manning, T.; March, M.; Marshall, J. L.; Martini, P.; Melchior, P.; Menanteau, F.; Miquel, R.; Morgan, R.; Myles, J.; Neilsen, E.; Ogando, R. L. C.; Palmese, A.; Paz-Chinchón, F.; Petravick, D.; Pieres, A.; Plazas, A. A.; Pond, C.; Rodriguez-Monroy, M.; Romer, A. K.; Roodman, A.; Rykoff, E. S.; Sako, M.; Sanchez, E.; Santiago, B.; Serrano, S.; Sevilla-Noarbe, I.; Smith, J. Allyn.; Smith, M.; Soares-Santos, M.; Suchyta, E.; Swanson, M. E. C.; Tarle, G.; Thomas, D.; To, C.; Tremblay, P. E.; Troxel, M. A.; Tucker, D. L.; Turner, D. J; Varga, T. N.; Walker, A. R.; Wechsler, R. H.; Weller, J.; Wester, W.; Wilkinson, R. D.; Yanny, B.; Zhang, Y.; Nikutta, R.; Fitzpatrick, M.; Jacques, A.; Scott, A.; Olsen, K.; Huang, L.; Herrera, D.; Juneau, S.; Nidever, D.; Weaver, B. A.; Adean, C.; Correia, V.; de Freitas, M.; Freitas, F. N.; Singulani, C.; Vila-Verde, G.
Source
Subject
Language
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 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 < 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.
Comment: Accepted version. Copyright AAS. Reproduced with permission. 29 pages, 13 figures. Visit https://des.ncsa.illinois.edu/releases/dr2
Comment: Accepted version. Copyright AAS. Reproduced with permission. 29 pages, 13 figures. Visit https://des.ncsa.illinois.edu/releases/dr2