Chandra X-ray Observatory Stack acisfJ1652519p023110_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".钱德拉源星表（Chandra Source Catalog，以下简称CSC）采用叠加（即重叠）的钱德拉观测数据开展X射线源探测工作。这使得该星表可收录比CSC 1.1版本暗弱得多的天体源。以该方式组合的重叠观测数据集被称为‘堆叠（stack）’。