FERMI OBSERVATIONS OF HIGH-ENERGY GAMMA-RAY EMISSION FROM GRB 090217A
FERMI OBSERVATIONS OF HIGH-ENERGY GAMMA-RAY EMISSION FROM GRB 090217A
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GRB 090217A 高能伽马射线发射的费米观测
DOI：
10.1088/2041-8205/717/2/l127
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Ackermann M
中科院分区：
文献类型：
--
作者：
Ackermann M
费米天文台正在通过高能量的开创性观测来推进我们对伽马射线暴（GRB）的认识，利用两个机载探测器，大面积望远镜（LAT）和伽马射线暴监测器（GBM），覆盖了七十多年的能量。在这里，我们报告了长GRB 090217A的观测，它触发了GBM，并已被LAT检测到，其显著性大于9σ。我们提出的GBM和LAT的观测和地面分析，包括时间分辨光谱和时间剖面的研究从8千电子伏到101 GeV。所有的光谱都很好地再现了一个带模型。我们将这些观测结果与LAT探测到的前两个长爆发GRB 080825C和GRB 080916C进行了比较。这些爆发被发现有时间依赖的光谱，并表现出延迟的高能量发射，这是没有观察到的情况下的GRB 090217 A。我们讨论了伽玛暴的高能发射的一些理论意义。
The Fermi observatory is advancing our knowledge of gamma-ray bursts (GRBs) through pioneering observations at high energies, covering more than seven decades in energy with the two on-board detectors, the Large Area Telescope (LAT) and the Gamma-ray Burst Monitor (GBM). Here, we report on the observation of the long GRB 090217A which triggered the GBM and has been detected by the LAT with a significance greater than 9σ. We present the GBM and LAT observations and on-ground analyses, including the time-resolved spectra and the study of the temporal profile from 8 keV up to∼ 1 GeV. All spectra are well reproduced by a Band model. We compare these observations to the first two LAT-detected, long bursts GRB 080825C and GRB 080916C. These bursts were found to have time-dependent spectra and exhibited a delayed onset of the high-energy emission, which are not observed in the case of GRB 090217A. We discuss some theoretical implications for the high-energy emission of GRBs.
影响因子：
4.9
作者：
Atwood, W. B.;Abdo, A. A.;Ziegler, M.
通讯作者：
Ziegler, M.
GBM GRB 位置的准确性
DOI：
--
发表时间：
2009
期刊：
影响因子：
--
作者：
M. Briggs;V. Connaughton;C. Meegan;C. Wilson;M. Kippen;K. Hurley;C. Meegan;C. Kouveliotou;N. Gehrels
通讯作者：
N. Gehrels