Chandra X-ray Observatory Stack acisfJ1621479m225404_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采用联合（即重叠）的钱德拉（Chandra）观测数据来探测X射线源。这使得该星表能够收录远较CSC 1.1版本暗弱的X射线源。以该方式组合的重叠观测集合，被称为"堆叠（stack）"。