Chandra X-ray Observatory Stack acisfJ1742253m294443_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（Chandra）观测数据开展X射线源（X-ray sources）探测工作。该方案可使本星表收录的天体源暗度显著低于CSC 1.1版本。通过此种方式组合得到的重叠观测集合，被称为“叠加观测组（stack）”。