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arXiv 1902.01082astro-ph.HE
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使用BALROG改进Fermi-GBM GRB定位

Improved Fermi-GBM GRB localizations using BALROG

F. Berlato, J. Greiner, J. Michael Burgess

摘要:

费米卫星上的伽马射线暴监测器(GBM)探测到的伽马射线暴(GRB)的定位受到3-15度的显著系统误差的影响。这主要是由于所采用的能带函数模板和实际的伽玛射线暴谱不匹配。这个问题可以通过同时拟合伽马射线暴的位置和频谱来避免,正如高级定位代码BALROG(arXiv:1610.07385)所示。在这里,我们分析了一个系统的方式,105个明亮的GBM检测到的伽玛暴的准确参考定位可从斯威夫特天文台的样本。我们表明,剩余的系统误差可以减少到$\sim$ 1-2度。

英文摘要:

The localizations of gamma-ray bursts (GRBs) detected with the Gamma-ray Burst Monitor (GBM) onboard the Fermi satellite are known to be affected by significant systematic errors of 3-15 degrees. This is primarily due to mismatch of the employed Band function templates and the actual GRB spectrum. This problem can be avoided by simultaneously fitting for the location and the spectrum of a GRB, as demonstrated with an advanced localization code, BALROG (arXiv:1610.07385). Here, we analyze in a systematic way a sample of 105 bright GBM-detected GRBs for which accurate reference localizations are available from the Swift observatory. We show that the remaining systematic error can be reduced to $\sim$1-2 degrees.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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