Chandra X-ray Observatory Stack acisfJ0246352m082535_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（钱德拉源目录，Chandra Source Catalog）采用合并（即重叠）的钱德拉X射线天文台（Chandra X-ray Observatory）观测数据探测X射线源。这使得该目录可收录比CSC 1.1版本显著更暗弱的X射线源。通过此种方式合并的重叠观测数据集被称为"堆叠（stack）"。