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Fig. 5


The dotted line is a synthetic spectrum of resolution R = 20   000. The true value of the FWHM for this spectrum is 5 px, but for this test we have used 10 px as a starting point. The blue line is the fit obtained with DAOSPEC run only once. The cyan line is the fit obtained after convergence of the FWHM. Refining the value of the FWHM not only allows for a better fit of the line profiles, but also avoids DAOSPEC missing some lines.

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