Characterising X-ray variability in light curves with complex sampling patterns: Application to the eROSITA south ecliptic pole survey

Open Access

Fig. 11

Dependence of the excess noise in a periodogram caused by varying fractional exposures, as a function of $\bar{ϵ}$ $\bar$ , and $f (\bar{ϵ}, σ_{ϵ}^{2})$ $f\left( {\bar ,\sigma _^2} \right)$ . The data points indicate a subset of the results of the simulations used to determine $\bar{ϵ}$ $\bar$ (Eqs. (16) and (17)). The lines indicate the best fit to all data, for four particular values of $\bar{ϵ}$ $\bar$ , using Eq. (17), and the parameter values in Table 4.

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