Chandra X-ray Observatory Stack acisfJ0831595p161511_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".钱德拉源星表（Chandra Source Catalog，CSC）采用经叠加（即重叠）处理的钱德拉X射线天文台（Chandra）观测数据进行X射线源（X-ray sources）探测。这使得该星表能够收录比CSC 1.1版本暗得多的X射线源。以该方式组合的重叠观测数据集集合被称为‘堆叠（stack）’。