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The unusual afterglow of the γ-ray burst of 26 March 1998 as evidence for a supernova connection

机译：1998年3月26日的γ射线爆发的异常余辉，证明是超新星连接

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Cosmic γ-ray bursts have now been firmly established as one of the most powerful phenomena in the Universe, releasing almost the rest-mass energy of a neutron star within the space of a few seconds (ref. 1). The two most popular models to explain γ-ray bursts are the coalescence of two compact objects such as neutron stars or black holes, or the catastrophic collapse of a massive star in a very energetic supernova-like explosion. Here we show that, about three weeks after the γ-ray burst of 26 March 1998, the transient optical source associated with the burst brightened to about 60 times the expected flux, based upon an extrapolation of the initial light curve. Moreover, the spectrum changed dramatically, with the colour becoming extremely red. We argue that the new source is an underlying supernova. If our hypothesis is true then this provides evidence linking cosmologically located γ-ray bursts with deaths of massive stars.
机译：现在已经牢固地确定了宇宙γ射线爆发是宇宙中最强大的现象之一，它在几秒钟的空间内释放了中子星的几乎所有剩余质量的能量（参考资料1）。解释γ射线爆发的两个最受欢迎的模型是两个紧凑物体（例如中子星或黑洞）的合并，或者是在非常活跃的超新星状爆炸中大质量恒星的灾难性坍塌。在这里，我们显示，在1998年3月26日的γ射线爆发后约三周，基于初始光曲线的外推，与爆发相关的瞬态光源变亮了预期通量的60倍。此外，光谱发生了巨大变化，颜色变得非常红色。我们认为新的来源是潜在的超新星。如果我们的假设是正确的，那么这提供了将宇宙定位的γ射线爆发与大质量恒星的死亡联系起来的证据。

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