most citedChi-square and Poissonian Data: Biases Even in the High-Count Regime and How to Avoid them

124 citations · 124 across the 1 of their papers we have counts for

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astro-ph2008★ 124 cited

Chi-square and Poissonian Data: Biases Even in the High-Count Regime and How to Avoid them

Philip J. Humphrey, Wenhao Liu, David A. Buote

We demonstrate that two approximations to the chi^2 statistic as popularly employed by observational astronomers for fitting Poisson-distributed data can give rise to intrinsically…