Chandra X-ray Observatory Stack acisfJ0228336p003318_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）利用合并（即重叠）的钱德拉（Chandra）观测数据开展X射线源（X-ray sources）探测工作。这使得该星表能够收录比CSC 1.1版本显著更暗弱的源。以该方式合并的重叠观测数据集被称为"堆叠（stack）"。