Dark Energy Survey Year 3 Results: Photometric Data Set for Cosmology
Dark Energy Survey Year 3 Results: Photometric Data Set for Cosmology
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DOI：
10.3847/1538-4365/abeb66
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
I. Sevilla-Noarbe;K. Bechtol;M. Carrasco Kind;A. Carnero Rosell;M. Becker;A. Drlica-Wagner;R. Gruendl-R.-Grue
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文献类型：
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作者：
I. Sevilla-Noarbe;K. Bechtol;M. Carrasco Kind;A. Carnero Rosell;M. Becker;A. Drlica-Wagner;R. Gruendl-R.-Grue
我们描述了暗能量调查(DES)光度数据集，该数据集来自科学操作的头三年，以支持DES第三年的宇宙学分析，并提供针对广泛的天体物理界的使用说明。Y3 GOLD改进了DES、Y1 GOLD和数据版本1(DES DR1)之前的版本，提供了一个扩展和精选的数据集，其中结合了图像去趋势和处理、光度学校准和对象分类方面的算法开发。Y3金包括南银河盖近5000°2的灰度级成像，包括近3.9亿个天体，深度达到信噪比∼10，对于扩展的天体，达到I AB∼23.0，对于19<；I AB<；22.5的星系，大气顶端光度学均匀度为98%，纯度>；99%。此外，它还包括每个对象的质量信息，以及用于选择宇宙学分析样本的足迹覆盖范围、遮罩区域、成像深度、调查条件和天体物理前景的附带地图。
We describe the Dark Energy Survey (DES) photometric data set assembled from the first three years of science operations to support DES Year 3 cosmologic 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 deg2 of grizY imaging in the south Galactic cap, including nearly 390 million objects, with depth reaching a signal-to-noise ratio ∼10 for extended objects up to i AB ∼ 23.0, and top-of-the-atmosphere photometric uniformity 98% and purity >99% for galaxies with 19 < i AB < 22.5. 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 cosmologic analysis samples.