Difference between our measurements and the true EW for synthetic spectra with a true FWHM of 5 px, at various resolutions and S/N. Top-left: average difference between the EWs measured with DOOp and the true EWs, for various input values of the FWHM, in synthetic spectra at three different resolutions. Top-right: same as top-left panel, but for measurements obtained without imposing the convergence of the FWHM. Bottom-left: same as top-left panel, for spectra of four different S/N. Bottom-right: same as bottom-left, but without imposing the convergence of the FWHM.
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