The observed amount of X-rays from Chandra and the non-detection of gamma rays from the Compton data show that the antimatter fraction in the Bullet Cluster is less than three parts per million.

• 不过，钱德拉望远镜观测到的X射线量和康普顿望远镜没有探测到伽马射线的数据说明，反物质在子弹星团中的比例不到百万分之三。