Fermi-LAT局域化性能的测量
Measurement of the Fermi-LAT Localization Performance
摘要：
我们目前的费米-LAT的本地化能力的研究结果，使用一个大的耀变体与精确的无线电位置。由于PSF的宽度随着能量而减小，因此性能通常由少数高能光子主导，因此适当地表征高能PSF是重要的。使用这些数据，我们发现需要修改发射前高能（大于几个GeV）PSF，该PSF来自LAT中粒子相互作用的广泛蒙特卡罗模拟;所得到的基于数据的PSF如图所示
英文摘要：
We present results of a study of the localization capability of Fermi-LAT, using a large set of blazars with precise radio locations. Since the width of the PSF decreases with energy, the performance is typically dominated by a few high energy photons, so it is important to properly characterize the high-energy PSF. Using such data, we have found a need to modify the pre-launch high-energy (greater than a few GeV) PSF derived from extensive Monte Carlo simulations of particle interactions in the LAT; the resulting data-based PSF is shown
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