γ暴研究的重大突破——首次观测到γ暴的光学和X射线余辉

Knowledge and Progress Breakthrough in γ-Burst Research Afterglow in X ray and Optical Bands Found *

意大利和荷兰联合发射的卫星ＢｅｐｐｏＳＡＸ在１９９７年２月２８日探测到了γ暴ＧＲＢ９７０２２８的Ｘ射线余辉，随后的地面和哈勃空间望远镜的观测证实在该位置上有一光学瞬变源．哈勃空间望远镜在此光学变源方位观测到一暗的河外天体．这是在γ暴这一当前天体物理中的最大疑难问题的研究中的一个重要突破．这一系列观测提供的证据表明，γ暴很可能是处在宇宙深处的天体中的事件．随后对ＧＲＢ９７０５０８的类似观测更增强了这一证据．

An X-ray afterglow from γ-ray burst GRB970228 was reported by the Italian-Dutch satellite BeppoSAX on Feb 28,1997.A transient optical source was also found in the same region with ground telescopes and the Hubble space telescope.The latter recorded a fuzzy faint source near the transient optical source.This is the first time an afterglow of a γ-burst has been observed,providing evidence their γ-bursts originate in the depths of the universe.Similar observation of GRB970508 provide further strong support to the cosmological origin of γ-bursts.