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Fig. 5.

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Same as Fig. 4 but for the interval 2008–2017 (in Appendix Table D.1). Due to the different scales used for the luminosity relative to the one for the temperature, the circle in Fig. 4 is an ellipse. The diagram shows the ‘to-and-fro’ tracks, consisting of ordinary pulsations before and after the 2013 outburst.

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