Chandra X-ray Observatory Stack acisfJ1833451m082752_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）钱德拉观测数据探测X射线源。这使得该目录能够包含比CSC 1.1显著更暗弱的源。以这种方式组合的重叠观测集被称为“堆叠集（stack）”。