Dark Energy Survey Year 3 Results: Photometric Data Set for Cosmology
Abstract
We describe the Dark Energy Survey (DES) photometric data set assembled from the first three years of science operations to support DES Year 3 cosmology analyses, and provide usage notes aimed at the broad astrophysics community. Y3 Gold improves on previous releases from DES, Y1 Gold and Data Release 1 (DES DR1), presenting an expanded and curated data set that incorporates algorithmic developments in image detrending and processing, photometric calibration, and object classification. Y3 Gold comprises nearly 5000 square degrees of grizY imaging in the south Galactic cap, including nearly 390 million objects, with depth reaching S/N ~ 10 for extended objects up to , and top-of-the-atmosphere photometric uniformity mmag. Compared to DR1, photometric residuals with respect to Gaia are reduced by , and per-object chromatic corrections are introduced. Y3 Gold augments DES DR1 with simultaneous fits to multi-epoch photometry for more robust galaxy color measurements and corresponding photometric redshift estimates. Y3 Gold features improved morphological star-galaxy classification with efficiency and purity for galaxies with . Additionally, it includes per-object quality information, and accompanying maps of the footprint coverage, masked regions, imaging depth, survey conditions, and astrophysical foregrounds that are used to select the cosmology analysis samples. This paper will be complemented by online resources.
Keywords
Cite
@article{arxiv.2011.03407,
title = {Dark Energy Survey Year 3 Results: Photometric Data Set for Cosmology},
author = {I. Sevilla-Noarbe and K. Bechtol and M. Carrasco Kind and A. Carnero Rosell and M. R. Becker and A. Drlica-Wagner and R. A. Gruendl and E. S. Rykoff and E. Sheldon and B. Yanny and A. Alarcon and S. Allam and A. Amon and A. Benoit-Lévy and G. M. Bernstein and E. Bertin and D. L. Burke and J. Carretero and A. Choi and H. T. Diehl and S. Everett and B. Flaugher and E. Gaztanaga and J. Gschwend and I. Harrison and W. G. Hartley and B. Hoyle and M. Jarvis and M. D. Johnson and R. Kessler and R. Kron and N. Kuropatkin and B. Leistedt and T. S. Li and F. Menanteau and E. Morganson and R. L. C. Ogando and A. Palmese and F. Paz-Chinchón and A. Pieres and C. Pond and M. Rodriguez-Monroy and J. Allyn-Smith and K. M. Stringer and M. A. Troxel and D. L. Tucker and J. de Vicente and W. Wester and Y. Zhang and T. M. C. Abbott and M. Aguena and J. Annis and S. Avila and S. Bhargava and S. L. Bridle and D. Brooks and D. Brout and F. J. Castander and R. Cawthon and C. Chang and C. Conselice and M. Costanzi and M. Crocce and L. N. da Costa and M. E. E. Pereira and T. M. Davis and S. Desai and J. P. Dietrich and P. Doel and K. Eckert and A. E. Evrard and I. Ferrero and P. Fosalba and J. García-Bellido and D. W. Gerdes and T. Giannantonio and D. Gruen and G. Gutierrez and S. R. Hinton and D. L. Hollowood and K. Honscheid and E. M. Huff and D. Huterer and D. J. James and T. Jeltema and K. Kuehn and O. Lahav and C. Lidman and M. Lima and H. Lin and M. A. G. Maia and J. L. Marshall and P. Martini and P. Melchior and R. Miquel and J. J. Mohr and R. Morgan and E. Neilsen and A. A. Plazas and A. K. Romer and A. Roodman and E. Sanchez and V. Scarpine and M. Schubnell and S. Serrano and M. Smith and E. Suchyta and G. Tarle and D. Thomas and C. To and T. N. Varga and R. H. Wechsler and J. Weller and R. D. Wilkinson},
journal= {arXiv preprint arXiv:2011.03407},
year = {2021}
}
Comments
see https://www.darkenergysurvey.org/des-year-3-cosmology-results-papers/ for the full DES Y3 cosmology release