Errors on abundance determination.
Notes. Columns 2 and 3: systematic errors;
comparison between abundances deduced from two different atmosphere models (Teff = 5206 K, log g = 2.4 and Teff = 5037 K, log g = 2.75) for HD 56438. For each element X, Δ([X/H]) = [X/H](5206K model) − [X/H](5037Kmodel).
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