Chandra X-ray Observatory Stack acisfJ2158062m150105_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采用经合并（即重叠）的钱德拉（Chandra）观测数据开展X射线源探测。此举可使该星表收录比CSC 1.1显著更暗的源。通过此种方式合并的重叠观测数据集被称为‘堆叠（stack）’。