Chandra X-ray Observatory Stack acisfJ1219232p055022_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 利用组合（即重叠）的钱德拉（Chandra）观测数据开展X射线源探测。这使得该X射线源星表可收录比CSC 1.1暗得多的源。以该方式组合的重叠观测数据集被称为“堆叠（stack）”。