Einstein IPC Ultrasoft Sources Catalog

A survey of the entire Einstein IPC database (a total of 5934 sources) has been carried out in order to select objects with strong components of ultrasoft X-ray...为筛选出具备强超软X射线（ultrasoft X-ray）成分的天体，我们对完整的爱因斯坦成像正比计数器（Einstein Imaging Proportional Counter，IPC）数据库（共计包含5934个源）开展了全面巡天调查……