钱德拉X射线源星表升级到2.2版：432,713个天体有了统一测量的档案
美国国家航空航天局（NASA）高能天体物理科学档案研究中心（HEASARC）11月5日公布，钱德拉X射线天文台的钱德拉源星表已经升级到2.2版（CSC 2.2）。新版星表于2026年10月发布，现已通过 HEASARC 的 Browse 与 Xamin 系统向全球研究者开放检索。
钱德拉源星表是钱德拉探测到的 X 射线源的权威星表，为每个源提供统一校准的测量属性，以及可以直接用于科学分析的数据产品。2.2版共收录432,713个独特的致密与延展 X 射线源，各项测量都汇入「主源表」，研究者既可以对大样本做统计分析，也可以逐个源深入研究。
随主星表一同发布的还有四个关联星表，分别管理叠加观测的源关联、叠加探测结果、源与观测的对应关系，以及逐次观测的探测记录，把同一天体在不同观测中的表现串成一份完整档案。
钱德拉X射线天文台1999年由「哥伦比亚」号航天飞机送入轨道，是 NASA「大天文台」系列成员，也是迄今最强的 X 射线望远镜，在轨运行已超过27年。这份持续更新的星表，是它留给全球天文学界的基础数据资产之一。（来源：美国国家航空航天局）
Chandra Source Catalog Reaches Version 2.2 With 432,713 X-Ray Sources
NASA's High Energy Astrophysics Science Archive Research Center (HEASARC) announced on November 5 that the Chandra Source Catalog has been updated to version 2.2 (CSC 2.2). The new release, issued in October 2026, is now available through HEASARC's Browse and Xamin systems.
The Chandra Source Catalog is the definitive catalog of X-ray sources detected by the Chandra X-ray Observatory, delivering uniformly calibrated properties and science-ready data products for each source. Version 2.2 includes measured properties for 432,713 unique compact and extended X-ray sources, gathered in the Master Sources table, allowing statistical analysis of large samples as well as studies of individual sources.
Four related catalogs were released alongside it, covering master source and stacked source associations, stacked detections, stacked source-observation associations and per-observation detections, linking how the same object appears across many separate observations.
Launched aboard the space shuttle Columbia in 1999, the Chandra X-ray Observatory is one of NASA's Great Observatories and the most powerful X-ray telescope ever flown, still operating after more than 27 years in orbit. The continuously updated catalog is one of its foundational data legacies for astronomers worldwide. (Source: NASA)
来源：美国国家航空航天局
发布：GSM·美国（发布链接）
图片来源：图：钱德拉X射线天文台拍摄的仙后座A超新星遗迹X射线图像（局部）。NASA/CXC 图片（公共领域），Wikimedia Commons。 / Photo: A Chandra X-ray Observatory image of the Cassiopeia A supernova remnant (close-up). NASA/CXC image, public domain, via Wikimedia Commons.
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