Fig. 12.
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Left: INTEGRAL SPI-ACS observation (black) with the maximum a posteriori model comprising a CARMA(2,1) process, a QPO and a skew-Gaussian mean function (blue), with posterior draws from the mean function in orange. Right: Posterior probability density of the period parameter shows a clear peak at 0.82 s, consistent with results obtained using the simpler DRW model.
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