黑暗能源调查3年结果：深场光学 +近红外图像和目录

论文标题

黑暗能源调查3年结果：深场光学 +近红外图像和目录

Dark Energy Survey Year 3 Results: Deep Field Optical + Near-Infrared Images and Catalogue

论文作者

Hartley, W. G., Choi, A., Amon, A., Gruendl, R. A., Sheldon, E., Harrison, I., Bernstein, G. M., Sevilla-Noarbe, I., Yanny, B., Eckert, K., Diehl, H. T., Alarcon, A., Banerji, M., Bechtol, K., Buchs, R., Cantu, S., Conselice, C., Cordero, J., Davis, C., Davis, T. M., Dodelson, S., Drlica-Wagner, A., Everett, S., Ferté, A., Gruen, D., Honscheid, K., Jarvis, M., Johnson, M. D., Kokron, N., MacCrann, N., Myles, J., Pace, A. B., Palmese, A., Paz-Chinchón, F., Pereira, M. E. S., Plazas, A. A., Prat, J., Rodriguez-Monroy, M., Rykoff, E. S., Samuroff, S., Sánchez, C., Secco, L. F., Tarsitano, F., Tong, A., Troxel, M. A., Vasquez, Z., Wang, K., Zhou, C., Abbott, T. M. C., Aguena, M., Allam, S., Annis, J., Bacon, D., Bertin, E., Bhargava, S., Brooks, D., Burke, D. L., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Castander, F. J., Costanzi, M., Crocce, M., da Costa, L. N., De Vicente, J., DeRose, J., Desai, S., Dietrich, J. P., Eifler, T. F., Elvin-Poole, J., Ferrero, I., Flaugher, B., Fosalba, P., García-Bellido, J., Gaztanaga, E., Gerdes, D. W., Gschwend, J., Gutierrez, G., Hinton, S. R., Hollowood, D. L., Huterer, D., James, D. J., Kent, S., Krause, E., Kuehn, K., Kuropatkin, N., Lahav, O., Lin, H., Maia, M. A. G., March, M., Marshall, J. L., Martini, P., Melchior, P., Menanteau, F., Miquel, R., Mohr, J. J., Morgan, R., Neilsen, E., Ogando, R. L. C., Pandey, S., Romer, A. K., Roodman, A., Sako, M., Sanchez, E., Scarpine, V., Serrano, S., Smith, M., Soares-Santos, M., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., To, C., Varga, T. N., Walker, A. R., Wester, W., Wilkinson, R. D., Zuntz, J.

论文摘要

我们描述了深色能源调查（DES）深场，一组图像和相关的多波长目录（$ ugrizjhks $），由黑暗能源摄像机（DECAM）以及可见的和红外调查望远镜用于天文学（Vista）数据。 Des Deep Fields包括11个字段（10个DES Supernova Fields Plus Cosmos），总面积为$ \ sim30〜 $ square degrees in $ ugriz $ bands，并达到最大$ i $ band的深度为26.75（AB，$10σ$，2 $，2 arcsec）。我们介绍了这四个领域的DES 3年宇宙学分析的目录，这些领域的全8波段覆盖率为$ 5.88〜 $SQ。DEG。掩盖后。 $ 2.8〜 $ $ $ $ $ $ r = 25.7，i = 25，z = 24.3 $ mag。我们使用建立在既定方法上的新模型拟合代码，以脱蓝色来源并确保$ u $ band的颜色一致到$ ks $ band波长范围。我们进一步详细介绍了我们维持在四个磁场之间光度法所需的点式函数建模上维持的严格控制。该目录使我们能够执行仔细的星形 - 加拉克斯分离，并产生出色的光度红移性能（$ {\ rm nmad} = 0.023 $ $ i <23 $）。 DES 3年弱透镜和星系聚类宇宙学工作完成后，将作为宇宙学数据产品发布的一部分提供深场目录。

We describe the Dark Energy Survey (DES) Deep Fields, a set of images and associated multi-wavelength catalogue ($ugrizJHKs$) built from Dark Energy Camera (DECam) and Visible and Infrared Survey Telescope for Astronomy (VISTA) data. The DES Deep Fields comprise 11 fields (10 DES supernova fields plus COSMOS), with a total area of $\sim30~$ square degrees in $ugriz$ bands and reaching a maximum $i$-band depth of 26.75 (AB, $10σ$, 2 arcsec). We present a catalogue for the DES 3-year cosmology analysis of those four fields with full 8-band coverage, totalling $5.88~$ sq. deg. after masking. Numbering $2.8~$million objects ($1.6~$million post masking), our catalogue is drawn from images coadded to consistent depths of $r=25.7, i=25, z=24.3$ mag. We use a new model-fitting code, built upon established methods, to deblend sources and ensure consistent colours across the $u$-band to $Ks$-band wavelength range. We further detail the tight control we maintain over the point-spread function modelling required for the model fitting, astrometry and consistency of photometry between the four fields. The catalogue allows us to perform a careful star-galaxy separation and produces excellent photometric redshift performance (${\rm NMAD} = 0.023$ at $i<23$). The Deep-Fields catalogue will be made available as part of the cosmology data products release, following the completion of the DES 3-year weak lensing and galaxy clustering cosmology work.

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