DOE OSTI · 1817422
The Dark Energy Survey Data Release 2
Abstract
In this work, 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 = 0farcs90, 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 1farcs95 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 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.
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Abbott, T. C., Adamów, M. (ORCID:000000026904359X), Aguena, M. (ORCID:0000000156796747), Allam, S. (ORCID:0000000270697857), Amon, A., Annis, J. (ORCID:0000000206093987), Avila, S., Bacon, D., Banerji, M., Bechtol, K., Becker, M. R. (ORCID:0000000177742246), Bernstein, G. M. (ORCID:0000000286138259), Bertin, E. (ORCID:0000000236023664), Bhargava, S., Bridle, S. L. (ORCID:0000000201281006), Brooks, D. (ORCID:0000000284585047), Burke, D. L. (ORCID:0000000318661950), Carnero Rosell, A. (ORCID:0000000330445150), Carrasco Kind, M. (ORCID:0000000248023194), Carretero, J. (ORCID:0000000231300204), Castander, F. J., Cawthon, R. (ORCID:0000000329656786), Chang, C. (ORCID:0000000278870896), Choi, A. (ORCID:000000025636233X), Conselice, C. (ORCID:0000000319497638), Costanzi, M., Crocce, M. (ORCID:0000000297456228), da Costa, L. N. (ORCID:000000027731277X), Davis, T. M. (ORCID:0000000242138783), De Vicente, J. (ORCID:0000000183186813), DeRose, J., Desai, S. (ORCID:0000000204663288), Diehl, H. T. (ORCID:0000000283577467), Dietrich, J. P., Drlica-Wagner, A. (ORCID:000000018251933X), Eckert, K. (ORCID:0000000214074700), Elvin-Poole, J. (ORCID:0000000151489203), Everett, S., Evrard, A. E. (ORCID:000000024876956X), Ferrero, I., Ferté, A. (ORCID:0000000330659941), Flaugher, B., Fosalba, P. (ORCID:0000000215105214), Friedel, D. (ORCID:0000000236327668), Frieman, J. (ORCID:0000000340793263), García-Bellido, J. (ORCID:0000000293708360), Gaztanaga, E. (ORCID:0000000196320815), Gelman, L., Gerdes, D. W. (ORCID:0000000169422736), Giannantonio, T. (ORCID:0000000298650436), Gill, M. S. (ORCID:0000000325245154), Gruen, D. (ORCID:0000000332707644), Gruendl, R. A. (ORCID:0000000245886517), Gschwend, J. (ORCID:0000000330238362), Gutierrez, G. (ORCID:0000000308250517), Hartley, W. G., Hinton, S. R. (ORCID:0000000320719349), Hollowood, D. L. (ORCID:0000000293694157), Honscheid, K. (ORCID:0000000265502023), Huterer, D. (ORCID:0000000165580112), James, D. J. (ORCID:0000000151604486), Jeltema, T., Johnson, M. D. (ORCID:0000000282900533), Kent, S. (ORCID:0000000342077420), Kron, R., Kuehn, K., Kuropatkin, N. (ORCID:0000000325110946), Lahav, O. (ORCID:0000000211349035), Li, T. S. (ORCID:0000000291106163), Lidman, C. (ORCID:0000000317310497), Lin, H. (ORCID:0000000278253206), MacCrann, N. (ORCID:0000000289983909), Maia, M. G. (ORCID:0000000198569307), Manning, T. A. (ORCID:0000000325459195), Maloney, J. D., March, M., Marshall, J. L. (ORCID:0000000307109474), Martini, P. (ORCID:0000000242794182), Melchior, P. (ORCID:0000000288735065), Menanteau, F. (ORCID:0000000213722534), Miquel, R. (ORCID:0000000266104836), Morgan, R. (ORCID:0000000270165471), Myles, J. (ORCID:0000000161455859), Neilsen, E. (ORCID:0000000273570317), Ogando, R. C. (ORCID:0000000321201154), Palmese, A. (ORCID:0000000260110530), Paz-Chinchón, F., Petravick, D., Pieres, A. (ORCID:0000000191866042), Plazas, A. A. (ORCID:0000000225980514), Pond, C., Rodriguez-Monroy, M., Romer, A. K. (ORCID:000000029328879X), Roodman, A. (ORCID:0000000153263486), Rykoff, E. S. (ORCID:0000000193763135), Sako, M. (ORCID:0000000327647093), Sanchez, E. (ORCID:0000000296468198), Santiago, B., Scarpine, V., Serrano, S.. 2021-07-27. The Dark Energy Survey Data Release 2. https://doi.org/10.3847/1538-4365%2Fac00b3
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