The Dark Energy Survey Data Management Operations

1536171/Petravick暗能量调查（DES）项目是探索宇宙加速的物理起源和暗能量性质的重要一步。 它由两部分组成：一张覆盖5000平方度的深层多波段地图，以及一张30平方度区域的“宇宙电影”，这是通过至少每六个晚上重访一次该区域而获得的。 广域巡天将测量大约3亿个星系的位置、形状、通量和近似（光度）红移，时域巡天将发现和测量数千颗超新星和其他瞬变的光变曲线。 数据收集工作于2013年8月开始，计划每年进行五次，每次为期六个月的观测季节。 广泛的社区和公众访问DES数据是DES数据管理系统的一个重要组成部分，从长远来看，这将使调查对实际进行调查的团体以外的团体有价值。 DES使用暗能量相机（DECam），这是一种由DES合作建造的新型宽视场设施仪器，安装在智利Cerro Tololo美洲天文台的布兰科4米望远镜的主焦点上。该奖项支持国家超级计算应用中心（NCSA）的DES数据管理（DM）系统在2016年1月至2021年8月期间继续运行，即，通过DES调查科学操作的结束。 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于2020财年末发布。 DESDM将原始图像处理成科学数据产品。 这包括：（1）每晚处理DES图像;（2）每年在每个观测季节结束时处理所有图像，并向协作机制发布一个数据库;（3）与科学工作组密切合作，改进还原算法;（4）制作经校准的单历元图像，通过国家光学天文观测台的科学档案发布;（5）制作和传播两个主要的公开发布的数据产品，一个基于DES的前两个观测季节（DR 1），另一个基于DES的全面调查（DR 2）。DES图像和星表的公开发布刺激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工作人员还参与向厄巴纳的双语小学学生提供外展服务，并在伊利诺伊州中东部的中学女生中促进数学和科学导向的职业。 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.