Drlica-Wagner, A;
Sevilla-Noarbe, I;
Rykoff', ES;
Gruendl, RA;
Yanny, B;
Tucker, DL;
Hoyle, B;
... Zuntz, J; + view all
(2018)
Dark Energy Survey Year 1 Results: The Photometric Data Set for Cosmology.
The Astrophysical Journal Supplement Series
, 235
(2)
10.3847/1538-4365/aab4f5.
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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 zero-points, 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 widearea object catalog consists of ~137 million objects detected in co-added images covering ~1800 deg2 in the DES grizY filters. The 10σ 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 zero-point 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.
| Type: | Article |
|---|---|
| Title: | Dark Energy Survey Year 1 Results: The Photometric Data Set for Cosmology |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3847/1538-4365/aab4f5 |
| Publisher version: | http://dx.doi.org/10.3847/1538-4365/aab4f5 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, catalogs, cosmology: observations, surveys, techniques: image processing, techniques: photometric, SCIENCE VERIFICATION DATA, TELESCOPE LENSING SURVEY, WIDE-FIELD CAMERA, REDSHIFT DISTRIBUTIONS, ULTRAVIOLET EXTINCTION, CROSS-CORRELATIONS, FAINT GALAXIES, ANGULAR MASKS, SURVEY IMAGES, IMAGING DATA |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1571422 |
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