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Fig. 3.

Fig. 3. Refer to the following caption and surrounding text.

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K2-18 XMM-Newton light curves from left to right: PN, MOS1, and MOS2, showing quasi-quiescent activity. The yellow background marks the good time interval (GTI) from each detector. Two light curves are plotted with different time binnings (gray 0.5 ks bin and brown 1.5 ks bin).

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