DECaLS DR5 color HiPS

The Legacy Survey is producing an inference model catalog of the sky from a set of optical and infrared imaging data, comprising 14,000 square degrees of extragalactic sky visible from the northern hemisphere in three optical bands (g,r,z) and four infrared bands. The sky coverage is approximately bounded by -18deg < delta < +84deg in celestial coordinates and |b||b| > 18deg in Galactic coordinates. The DECam Legacy Survey is providing these data in the equatorial region at delta < +30deg using the Dark Energy Camera on the Blanco Telescope. The color images are based on the g,r,z filters. Data Release 5 (DR5) is the fifth public data release of the Legacy Surveys. DR5 imaging is first reduced through the NOAO Community Pipeline before being processed using the Tractor. Images from DECaLS g,r,z-band observations are included from August 2014 through May 2017. DR5 also includes DECam data from a range of non-DECaLS surveys, including observations that were conducted from September 2012 to May 2017.

遗产巡天（Legacy Survey）正基于一套光学与红外成像数据集，构建全天体的推断模型星表。该巡天覆盖北半球可见的14000平方度河外天区，包含3个光学波段（g、r、z）与4个红外波段的观测数据。
其天区覆盖范围在天球坐标系中大致满足赤纬-18° < δ < +84°，在银道坐标系中则满足银纬|b| > 18°。
暗能量相机遗产巡天（DECam Legacy Survey，缩写DECaLS）依托布兰科望远镜（Blanco Telescope）上的暗能量相机（Dark Energy Camera），为赤纬δ < +30°的赤道天区提供上述观测数据。其彩色成像基于g、r、z波段滤光片生成。
第五次数据发布（Data Release 5，缩写DR5）是遗产巡天（Legacy Surveys）的第五次公开数据发布成果。DR5的成像数据首先通过美国国家光学天文台（National Optical Astronomy Observatory，缩写NOAO）社区处理流水线（NOAO Community Pipeline）进行预处理，随后再经由Tractor工具完成后续处理。
DR5包含2014年8月至2017年5月期间的DECaLS巡天g、r、z波段观测成像数据。此外，DR5还涵盖了一系列非DECaLS巡天项目的暗能量相机观测数据，其中观测时间跨度为2012年9月至2017年5月。