Chandra X-ray Observatory Stack acisfJ1734350m301814_001

CSC uses combined (i.e. overlapping) Chandra observations for detecting X-ray sources. This allows the catalog to include significantly fainter sources than CSC 1.1. The set of overlapping observations that have been combined in this way is known as a "stack".钱德拉源表（Chandra Source Catalog，CSC）采用经合并（即重叠）处理的钱德拉观测数据开展X射线源探测。这使得该源表能够收录比CSC 1.1版本暗弱得多的X射线源。通过此种方式合并的重叠观测数据集被称为“堆叠（stack）”。