Chandra X-ray Observatory Stack acisfJ0856047p450520_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采用经组合（即重叠）的钱德拉（Chandra）观测数据来探测X射线源（X-ray sources）。这令该源表可收录较CSC 1.1版本暗弱得多的X射线源。以该方式组合的重叠观测数据集被称为“叠加组（stack）”。