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arXiv 0910.0482astro-ph.HEastro-ph.COastro-ph.IM
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未分辨点源排放的统计检验

A statistical test of emission from unresolved point sources

Tracy R. Slatyer, Douglas P. Finkbeiner

摘要:

我们描述了一个简单的测试的离散事件的合奏的空间均匀性。给出了点源光度函数和仪器点扩散函数的估计,得到了分数阶点源对扩散信号贡献的一个可靠的上界,并通过Monte Carlo试验验证了该统计量优于两点关联函数,得到了该统计量的均值和方差作为点源贡献函数的解析估计.作为一个案例研究,我们应用这个统计数据,最近的伽马射线数据从费米大面积望远镜(LAT),并表明,在能量超过10 GeV,未解决的点源的漫发射的贡献是小的相关研究的WMAP霾的区域。

英文摘要:

We describe a simple test of the spatial uniformity of an ensemble of discrete events. Given an estimate for the point source luminosity function and an instrumental point spread function (PSF), a robust upper bound on the fractional point source contribution to a diffuse signal can be found. We verify with Monte Carlo tests that the statistic has advantages over the two-point correlation function for this purpose, and derive analytic estimates of the statistic's mean and variance as a function of the point source contribution. As a case study, we apply this statistic to recent gamma-ray data from the Fermi Large Area Telescope (LAT), and demonstrate that at energies above 10 GeV, the contribution of unresolved point sources to the diffuse emission is small in the region relevant for study of the WMAP Haze.

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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