Chandra X-ray Observatory Stack acisfJ2113522p023511_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 采用组合（即重叠）的钱德拉X射线天文台（Chandra X-ray Observatory）观测数据开展X射线源探测。此举使得该星表能够收录比CSC 1.1暗得多的源。以该方式组合的重叠观测集合被称为‘stack’。