The Dark Energy Survey Data Release 2
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.
Cite
@article{arxiv.2101.05765,
title = {The Dark Energy Survey Data Release 2},
author = {DES Collaboration and T. M. C. Abbott and M. Adamow and M. Aguena and S. Allam and A. Amon and J. Annis and S. Avila and D. Bacon and M. Banerji and K. Bechtol and M. R. Becker and G. M. Bernstein and E. Bertin and S. Bhargava and S. L. Bridle and D. Brooks and D. L. Burke and A. Carnero Rosell and M. Carrasco Kind and J. Carretero and F. J. Castander and R. Cawthon and C. Chang and A. Choi and C. Conselice and M. Costanzi and M. Crocce and L. N. da Costa and T. M. Davis and J. De Vicente and J. DeRose and S. Desai and H. T. Diehl and J. P. Dietrich and A. Drlica-Wagner and K. Eckert and J. Elvin-Poole and S. Everett and A. E. Evrard and I. Ferrero and A. Ferté and B. Flaugher and P. Fosalba and D. Friedel and J. Frieman and J. García-Bellido and L. Gelman and D. W. Gerdes and T. Giannantonio and M. Gill and D. Gruen and R. A. Gruendl and J. Gschwend and G. Gutierrez and W. G. Hartley and S. R. Hinton and D. L. Hollowood and K. Honscheid and D. Huterer and D. J. James and T. Jeltema and M. D. Johnson and S. Kent and R. Kron and K. Kuehn and N. Kuropatkin and O. Lahav and T. S. Li and C. Lidman and H. Lin and N. MacCrann and M. A. G. Maia and T. Manning and M. March and J. L. Marshall and P. Martini and P. Melchior and F. Menanteau and R. Miquel and R. Morgan and J. Myles and E. Neilsen and R. L. C. Ogando and A. Palmese and F. Paz-Chinchón and D. Petravick and A. Pieres and A. A. Plazas and C. Pond and M. Rodriguez-Monroy and A. K. Romer and A. Roodman and E. S. Rykoff and M. Sako and E. Sanchez and B. Santiago and S. Serrano and I. Sevilla-Noarbe and J. Allyn. Smith and M. Smith and M. Soares-Santos and E. Suchyta and M. E. C. Swanson and G. Tarle and D. Thomas and C. To and P. E. Tremblay and M. A. Troxel and D. L. Tucker and D. J Turner and T. N. Varga and A. R. Walker and R. H. Wechsler and J. Weller and W. Wester and R. D. Wilkinson and B. Yanny and Y. Zhang and R. Nikutta and M. Fitzpatrick and A. Jacques and A. Scott and K. Olsen and L. Huang and D. Herrera and S. Juneau and D. Nidever and B. A. Weaver and C. Adean and V. Correia and M. de Freitas and F. N. Freitas and C. Singulani and G. Vila-Verde},
journal= {arXiv preprint arXiv:2101.05765},
year = {2021}
}
Comments
Accepted version. Copyright AAS. Reproduced with permission. 29 pages, 13 figures. Visit https://des.ncsa.illinois.edu/releases/dr2