Chandra X-ray Observatory Stack acisfJ1155232p230851_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".钱德拉源目录（Chandra Source Catalog，简称CSC）采用叠加（即重叠）的钱德拉X射线天文台观测数据开展X射线源（X-ray sources）探测。该方案使得该星表能够收录比CSC 1.1版本显著更暗的源。以该方式组合的重叠观测数据集被称为‘堆叠（stack）’。