Chandra X-ray Observatory Stack acisfJ0428512m462146_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（Chandra）观测数据来探测X射线源（X-ray sources）。该方法使得该源目录能够收录比CSC 1.1版本暗得多的天体源。通过此方式合并得到的重叠观测集合被称为“堆叠（stack）”。