Fig. 5
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Effect of the changes of the temperature of the Échelle grating in the FWHM. Top panels: combined FWHM time series of ESPRESSO and CARMENES, a zoom into the latest ESPRESSO campaign and the periodogram of the data. Middle panels: same plot for the combined FWHM time series of ESPRESSO and CARMENES after detrending with respect to the temperature variations of the Échelle grating. Bottom panels: same plot for the estimated effect in FWHM due to temperature changes.
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