ROSAT observations of ACO clusters

We have compiled an X-ray catalog of optically selected rich clusters of galaxies observed by the Position Sensitive Proportional Counter (PSPC) during the pointed GO phase of...我们汇编了一套X射线星表，其中收录了由位置敏感正比计数器（Position Sensitive Proportional Counter，PSPC）在……的定点观测（GO）阶段所观测得到的光学选样富星系团。