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Fig. 4

image

Individual model components plotted over the excess light curve for Na D2 at 1.5 Å. Panel A): best-fit flare model component. In this panel the green dashed lines indicate the beginning and the end of the transit; panel B): best-fit differential limb-darkening model component; panel C): best-fit changing RV model component, which includes the exoplanetary atmospheric excess absorption in addition to a bump at the center. The final best-fit model, which is the combination of all the model components, is shown in Fig. 6.

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