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arXiv 0907.0385astro-ph.HEastro-ph.IM
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用费米LAT分析cosmic ray电子的仪器模拟

Instrument simulation for the analysis of cosmic ray electron with the Fermi LAT

C. Sgrò, J. Bregeon, L. Baldini

摘要:

费米LAT合作已经建立了一个详细的蒙特卡罗模拟,以表征仪器的响应和调整其性能。仿真代码是建立在广泛使用的GEANT4工具包,并仔细验证对梁测试和飞行数据。这张海报展示了如何使用完整的LAT模拟来开发宇宙射线电子(\emph{CRE})分析的事件选择,以优化仪器性能。特别地,我们将详细地展示几何因子和剩余强子污染的确定。非常精确的MC模拟被证明是控制费米LAT测量的CRE谱的系统不确定性的基础。

英文摘要:

The Fermi LAT collaboration has built up a detailed Monte Carlo simulation to characterize the instrument response and tune its performance. The simulation code is built around the widely used GEANT4 toolkit and was carefully validated against beam test and flight data. This poster shows how the full LAT simulation is used to develop the event selection for the Cosmic-Ray Electron (\emph{CRE}) analysis so as to optimize the instrument performance. In particular, we will show in detail the determination of the geometry factor and the residual hadron contamination. The very accurate MC simulation proved to be fundamental to control the systematic uncertainties on the CRE spectrum measured by the Fermi LAT.

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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