Extended Data Fig. 5: The probability density function (PDF) (left) and the cumulative distribution function (CDF) (right) of the 105 simulated maximum Δχ2 values. | Nature Astronomy

Extended Data Fig. 5: The probability density function (PDF) (left) and the cumulative distribution function (CDF) (right) of the 105 simulated maximum Δχ2 values.

From: Evidence for a compact object in the aftermath of the extragalactic transient AT2018cow

Extended Data Fig. 5

The vertical dashed red line marks the value of the Δχ2 of the observed 224 Hz QPO. The false alarm probability (1-CDF) vs Δχ2 is shown in the right panel of Fig. 1. The false alarm probability of seeing a spurious signal as strong as the one seen in data at 224 Hz is 0.0002 (1 in 5000).

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