Chandra X-ray Observatory Stack acisfJ0525299m471432_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".钱德拉源星表（Chandra Source Catalog，CSC）采用经组合（即重叠）的钱德拉（Chandra）观测数据来探测X射线源（X-ray sources）。这使得该星表能够收录比CSC 1.1版本显著更暗弱的X射线源。以该方法组合得到的重叠观测集合，被称为‘堆叠（stack）’。