Here, 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 deg2 in the DES grizY filters. The 10 limiting magnitude for galaxies is g = 23.4, r = 23.2, i = 22.5, z = 21.8, and Y = 20.1. We also performed photometric calibration of Y1A1 GOLD 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.
Drlica-Wagner, A.. "Dark Energy Survey Year 1 Results: Photometric Data Set for Cosmology." The Astrophysical Journal. Supplement Series, vol. 235, no. 2, Apr. 2018. https://doi.org/10.3847/1538-4365/aab4f5
Drlica-Wagner, A. (2018). Dark Energy Survey Year 1 Results: Photometric Data Set for Cosmology. The Astrophysical Journal. Supplement Series, 235(2). https://doi.org/10.3847/1538-4365/aab4f5
Drlica-Wagner, A., "Dark Energy Survey Year 1 Results: Photometric Data Set for Cosmology," The Astrophysical Journal. Supplement Series 235, no. 2 (2018), https://doi.org/10.3847/1538-4365/aab4f5
@article{osti_1389251,
author = {Drlica-Wagner, A.},
title = {Dark Energy Survey Year 1 Results: Photometric Data Set for Cosmology},
annote = {Here, 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 deg2 in the DES grizY filters. The 10 limiting magnitude for galaxies is g = 23.4, r = 23.2, i = 22.5, z = 21.8, and Y = 20.1. We also performed photometric calibration of Y1A1 GOLD 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.},
doi = {10.3847/1538-4365/aab4f5},
url = {https://www.osti.gov/biblio/1389251},
journal = {The Astrophysical Journal. Supplement Series},
issn = {ISSN 0067-0049},
number = {2},
volume = {235},
place = {United States},
publisher = {American Astronomical Society},
year = {2018},
month = {04}}
Brookhaven National Laboratory (BNL), Upton, NY (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)