From top to bottom: fit of Ba ii line at 6496 Å, La ii line at 6390 Å, and Eu ii line at 6645 Å for μ Leo (ESPaDOnS spectrum, see text for reference, degraded to UVES resolution). Black crosses: observed spectrum; red solid line: best fit; blue solid lines: spectra computed for the best-fit value of [X/Fe] ±0.3 dex.
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