Chandra X-ray Observatory Stack acisfJ1229492p112355_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".CSC（钱德拉源目录，Chandra Source Catalog）采用叠加（即重叠）的钱德拉X射线天文台（Chandra X-ray Observatory）观测数据探测X射线源。该方法使得该星表能够收录比CSC 1.1版本显著更暗弱的天体源。以该方式组合得到的重叠观测数据集，被称为‘堆叠（stack）’。