黑暗能源调查3年结果：宇宙学的光度数据集

论文标题

黑暗能源调查3年结果：宇宙学的光度数据集

Dark Energy Survey Year 3 Results: Photometric Data Set for Cosmology

论文作者

Sevilla-Noarbe, I., Bechtol, K., Kind, M. Carrasco, Rosell, A. Carnero, Becker, M. R., Drlica-Wagner, A., Gruendl, R. A., Rykoff, E. S., Sheldon, E., Yanny, B., Alarcon, A., Allam, S., Amon, A., Benoit-Lévy, A., Bernstein, G. M., Bertin, E., Burke, D. L., Carretero, J., Choi, A., Diehl, H. T., Everett, S., Flaugher, B., Gaztanaga, E., Gschwend, J., Harrison, I., Hartley, W. G., Hoyle, B., Jarvis, M., Johnson, M. D., Kessler, R., Kron, R., Kuropatkin, N., Leistedt, B., Li, T. S., Menanteau, F., Morganson, E., Ogando, R. L. C., Palmese, A., Paz-Chinchón, F., Pieres, A., Pond, C., Rodriguez-Monroy, M., Allyn-Smith, J., Stringer, K. M., Troxel, M. A., Tucker, D. L., de Vicente, J., Wester, W., Zhang, Y., Abbott, T. M. C., Aguena, M., Annis, J., Avila, S., Bhargava, S., Bridle, S. L., Brooks, D., Brout, D., Castander, F. J., Cawthon, R., Chang, C., Conselice, C., Costanzi, M., Crocce, M., da Costa, L. N., Pereira, M. E. E., Davis, T. M., Desai, S., Dietrich, J. P., Doel, P., Eckert, K., Evrard, A. E., Ferrero, I., Fosalba, P., García-Bellido, J., Gerdes, D. W., Giannantonio, T., Gruen, D., Gutierrez, G., Hinton, S. R., Hollowood, D. L., Honscheid, K., Huff, E. M., Huterer, D., James, D. J., Jeltema, T., Kuehn, K., Lahav, O., Lidman, C., Lima, M., Lin, H., Maia, M. A. G., Marshall, J. L., Martini, P., Melchior, P., Miquel, R., Mohr, J. J., Morgan, R., Neilsen, E., Plazas, A. A., Romer, A. K., Roodman, A., Sanchez, E., Scarpine, V., Schubnell, M., Serrano, S., Smith, M., Suchyta, E., Tarle, G., Thomas, D., To, C., Varga, T. N., Wechsler, R. H., Weller, J., Wilkinson, R. D.

论文摘要

我们描述了从科学运营的前三年组装的黑暗能源调查（DES）光度数据集，以支持DES 3年级宇宙学分析，并提供针对广泛天体物理学社区的使用说明。 Y3 Gold改善了DES，Y1 Gold和Data Release 1（DES DR1）的先前发行版，并提出了一个扩展的和策划的数据集，该数据集将算法开发纳入图像逐渐降低和处理，光度法校准和对象分类中。 Y3黄金在南银河盖中包含近5000平方的Grizy成像，其中包括近3.9亿个物体，其深度达到S/N〜10，对于最高$ i_ {ab} \ sim 23.0 $的扩展对象，以及顶级的atmosphere photopermosphere光度均匀度均匀性$ <3 $ <$ <$ mmag。与DR1相比，相对于GAIA的光度残差减少了$ 50 \％$，并引入了每个对象的彩色校正。 Y3黄金增强DES DR1具有同时拟合的多个上述光度法，以进行更健壮的星系颜色测量和相应的光度红移估计。 Y3黄金具有效率的改进的形态星形 - 果实分类，$> 98 \％$和纯度$> 99 \％$，$ 19 <i_ {ab {ab} <22.5 $。此外，它包括每个对象的质量信息，以及覆盖范围，蒙面区域，成像深度，调查条件和天体物理前景的伴随地图，这些图用于选择宇宙学分析样本。本文将由在线资源补充。

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 $i_{AB}\sim 23.0$, and top-of-the-atmosphere photometric uniformity $< 3$ mmag. Compared to DR1, photometric residuals with respect to Gaia are reduced by $50\%$, 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 $>98\%$ 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 cosmology analysis samples. This paper will be complemented by online resources.

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