Chandra X-ray Observatory Stack acisfJ1250070p021508_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 采用叠加（即重叠）的钱德拉（Chandra）观测数据开展X射线源（X-ray sources）探测工作。此举使得该星表能够收录比CSC 1.1版本显著更暗的天体。通过此种方式组合的重叠观测数据集，被称为“stack”。