Chandra X-ray Observatory Stack acisfJ1156289p550805_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。这使得该源目录可比CSC 1.1版本收录显著更暗弱的天体。以该方式合并的重叠观测数据集被称为“叠加组（stack）”。