XMM-Newton Serendipitous Source Catalogue 4XMM-DR12

Sky surveys produce enormous quantities of data on extensive regions of the sky. The easiest way to access this information is through catalogues of standardised data products....

巡天观测（Sky surveys）可针对广袤天区生成海量观测数据。获取此类信息的最便捷途径，便是通过标准化数据产品目录。