Chandra X-ray Observatory Stack acisfJ2018045p284004_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 采用合并（即重叠）的钱德拉（Chandra）观测数据开展X射线源探测工作。此举可使该星表收录比CSC 1.1暗得多的天体。以该方式合并的重叠观测数据集被称为“堆叠（stack）”。