Fig. A.4.

Left: cumulative distribution of global chance probability of the maximum LSP power (ζmax) searched in the given frequency range of interest (1.2 × 10−4 − 5.1 × 10−3 Hz). The probability P(> ζmax) is calculated as the values exceeding a given maximum power. The red vertical line represents the probability of maximum LSP power exceeding the observed QPO value, ζmax, obs = 9.25 for the XMM2000 data, which corresponds to a global statistical significance of 96.81% for the QPO detection. Right: same as left, but for the simulations of XMM2019 data.
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