The Dark Energy Survey Data Management Operations

1536171/Petravick暗能量调查(DES)项目是在探索宇宙加速的物理起源和暗能量性质方面向前迈出的重要一步。它由两部分组成：一幅覆盖5000平方度的深度多波段地图，以及一部每六个晚上至少重访一次该地区的30平方度区域的“宇宙电影”。广域探测将测量大约3亿个星系的位置、形状、通量和近似(光度)红移，而时间域探测将发现和测量数千颗超新星和其他瞬变的光曲线。数据收集工作于2013年8月开始，计划分五个年度、六个月的观察季进行。广泛的社区和公众对DES数据的访问是DES数据管理系统的重要组成部分，从长远来看，这将使这项调查对远远超出实际开展调查的群体具有价值。DES使用暗能量相机(DECAM)，这是DES合作制造的一种新的广视场设施仪器，安装在智利Cerro Tololo美洲天文台的Blanco 4米望远镜的主焦点上。该奖项支持DES数据管理(DM)系统在国家超级计算应用中心(NCSA)从2016年1月到2021年8月继续运行，也就是说，直到DES调查科学作业结束。涵盖整个调查的完全校准和完全重新缩减的公共数据集将在2020财年年底左右发布。DESDM将原始图像处理成可供科学使用的数据产品。这包括：(1)DES图像的夜间处理；(2)在每个观测季节结束时对所有图像进行年度处理，并向合作伙伴发布一个数据库；(3)与各科学工作组密切协作，改进简化算法；(4)制作通过国家光学天文台科学档案馆发布的已校准的单历元图像；(5)制作和传播两个主要的公开发布的数据产品，一个基于前两个DES观测季节(DR1)，另一个基于完整的DES调查(DR2)。除了用于主要科学目标之外，公开发布DES图像和星表还促进了天文学界的各种研究，以及公众对公民科学的重大参与。这些档案研究项目将远远超出DES的科学目标。DESDM的工作人员还参与了对Urbana的双语小学生的外联活动，以及在伊利诺伊州中东部的中学女孩中促进数学和科学方面的职业。DESDM软件代码都是开源的，它们的分发鼓励更广泛的社区使用。

1536171/PetravickThe Dark Energy Survey (DES) project is a major step forward in probing the physical origin of cosmic acceleration and the nature of dark energy. It consists of two pieces: a deep, multi-band map covering 5000 square degrees, and a "cosmic movie" of a thirty square-degree region obtained by revisiting that area at least once every six nights. The wide-area survey will measure positions, shapes, fluxes, and approximate (photometric) redshifts for around 300 million galaxies, and the time-domain survey will discover and measure light curves for several thousand supernovae and other transients. Data collection began in August 2013 and is planned to run for five annual, six-month observing seasons. Wide community and public access to the DES data are a vital component of the DES Data Management system, and will make the survey valuable in the long run to groups far beyond those actually carrying out the survey. DES uses the Dark Energy Camera (DECam), a new wide-field, facility instrument built by the DES collaboration and installed at the prime focus of the Blanco 4-meter telescope at Cerro Tololo Inter-American Observatory in Chile.This award supports continued operation of the DES Data Management (DM) system at the National Center for Supercomputing Applications (NCSA) from January 2016 to August 2021, that is, through the end of DES survey science operations. A fully calibrated and completely re-reduced public dataset covering the entire survey will be issued around the end of FY 2020. DESDM processes raw images into science-ready data products. This involves: (1) nightly processing of DES images, (2) annual processing of all images at the end of each observing season and release of a database to the Collaboration; (3) improvements in reduction algorithms, in close concert with the science working groups; (4) production of calibrated, single-epoch images released via the Science Archive at the National Optical Astronomy Observatory; (5) production and dissemination of two major public releases of data products, one based on the first two DES observing seasons (DR1), and the second based on the full DES survey (DR2).In addition to their use for the primary science goals, the public release of DES images and catalogs stimulates a wide variety of research by the astronomy community, as well as significant engagement in citizen science by the general public. These archival research projects will go well beyond the scientific goals of the DES. DESDM staff are also involved with outreach to dual language elementary school students in Urbana, and the promotion of math- and science-oriented careers among middle school girls in east-central Illinois. DESDM software codes are all open source and their distribution encourages broader community use.