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Explanation of figure: PulsarMon uses a PdF (proportional to amplitude squared of the noise) averaged using 15 strides. If the underlying process is Gaussian, the distribution describing the output of PulsarMon should be a non-central Chi-Square distribution with 15 degrees of freedom and non central parameter delta equal to the sum of the mean of each Gaussian process (I assumed similar means so I multiplied by 15 the average of the output of PulsarMon).