Chandra X-ray Observatory Stack acisfJ1428379p353421_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".钱德拉源目录（Chandra Source Catalog，CSC）采用经叠加（即重叠）处理的钱德拉（Chandra）观测数据来探测X射线源。这使得该目录能够收录远暗于CSC 1.1版本的X射线源。以该方式组合的重叠观测数据集被称为‘堆叠（stack）’。