Fermi Observations of High-Energy Gamma-Ray Emission from GRB 080916C
Fermi Observations of High-Energy Gamma-Ray Emission from GRB 080916C
复制标题
GRB 080916C 的高能伽马射线发射的费米观测
DOI：
10.1126/science.1169101
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发表时间：
2009-03-27
期刊：
影响因子：
56.9
通讯作者：
Ziegler, M.
中科院分区：
文献类型：
--
作者：
Abdo, A. A.;Ackermann, M.;Ziegler, M.
伽马射线暴（GRB）是一种高能爆炸，标志着遥远星系中大质量恒星的死亡。费米天文台上的伽玛射线暴监测器和大面积望远镜一起记录了跨越大约70年伽玛射线能量的广泛能量范围内的伽玛射线暴。2008年9月，费米观测到异常明亮的GRB 080916C，有着迄今为止最大的能量释放。高能量的伽马射线被观察到比低能量的光子更晚开始并且持续更长时间。一个简单的频谱形式适合整个伽玛射线暴频谱，提供了强有力的限制发射模型。已知的爆发距离使得能够对流出的体积洛伦兹因子和量子引力质量设置下限。
Gamma-ray bursts (GRBs) are highly energetic explosions signaling the death of massive stars in distant galaxies. The Gamma-ray Burst Monitor and Large Area Telescope onboard the Fermi Observatory together record GRBs over a broad energy range spanning about 7 decades of gamma-ray energy. In September 2008, Fermi observed the exceptionally luminous GRB 080916C, with the largest apparent energy release yet measured. The high-energy gamma rays are observed to start later and persist longer than the lower energy photons. A simple spectral form fits the entire GRB spectrum, providing strong constraints on emission models. The known distance of the burst enables placing lower limits on the bulk Lorentz factor of the outflow and on the quantum gravity mass.