Dark Energy Survey Year 1 Results: Photometric Data Set for Cosmology
Abstract
We describe the creation, content, and validation of the Dark Energy Survey (DES) internal year-one cosmology data set, Y1A1 GOLD, in support of upcoming cosmological analyses. The Y1A1 GOLD data set is assembled from multiple epochs of DES imaging and consists of calibrated photometric zeropoints, object catalogs, and ancillary data products - e.g., maps of survey depth and observing conditions, star-galaxy classification, and photometric redshift estimates - that are necessary for accurate cosmological analyses. The Y1A1 GOLD wide-area object catalog consists of ~137 million objects detected in coadded images covering ~1800 deg in the DES grizY filters. The 10{\sigma} limiting magnitude for galaxies is g = 23.4, r = 23.2, i = 22.5, z = 21.8, and Y = 20.1. Photometric calibration of Y1A1 GOLD was performed by combining nightly zeropoint solutions with stellar-locus regression, and the absolute calibration accuracy is better than 2% over the survey area. DES Y1A1 GOLD is the largest photometric data set at the achieved depth to date, enabling precise measurements of cosmic acceleration at z 1.
Keywords
Cite
@article{arxiv.1708.01531,
title = {Dark Energy Survey Year 1 Results: Photometric Data Set for Cosmology},
author = {A. Drlica-Wagner and I. Sevilla-Noarbe and E. S. Rykoff and R. A. Gruendl and B. Yanny and D. L. Tucker and B. Hoyle and A. Carnero Rosell and G. M. Bernstein and K. Bechtol and M. R. Becker and A. Benoit-Levy and E. Bertin and M. Carrasco Kind and C. Davis and J. de Vicente and H. T. Diehl and D. Gruen and W. G. Hartley and B. Leistedt and T. S. Li and J. L. Marshall and E. Neilsen and M. M. Rau and E. Sheldon and J. Smith and M. A. Troxel and S. Wyatt and Y. Zhang and T. M. C. Abbott and F. B. Abdalla and S. Allam and M. Banerji and D. Brooks and E. Buckley-Geer and D. L. Burke and D. Capozzi and J. Carretero and C. E. Cunha and C. B. D'Andrea and L. N. da Costa and D. L. DePoy and S. Desai and J. P. Dietrich and P. Doel and A. E. Evrard and A. Fausti Neto and B. Flaugher and P. Fosalba and J. Frieman and J. Garcia-Bellido and D. W. Gerdes and T. Giannantonio and J. Gschwend and G. Gutierrez and K. Honscheid and D. J. James and T. Jeltema and K. Kuehn and S. Kuhlmann and N. Kuropatkin and O. Lahav and M. Lima and H. Lin and M. A. G. Maia and P. Martini and R. G. McMahon and P. Melchior and F. Menanteau and R. Miquel and R. C. Nichol and R. L. C. Ogando and A. A. Plazas and A. K. Romer and A. Roodman and E. Sanchez and V. Scarpine and R. Schindler and M. Schubnell and M. Smith and R. C. Smith and M. Soares-Santos and F. Sobreira and E. Suchyta and G. Tarle and V. Vikram and A. R. Walker and R. H. Wechsler and J. Zuntz},
journal= {arXiv preprint arXiv:1708.01531},
year = {2018}
}
Comments
43 pages, 28 figures, 8 tables; updated to match published version