Fig. A.1
Difference between SE = 100 and the S values obtained by varying the spectral resolution and the ISM parameters (RV and log NCaII), keeping E fixed at 100 erg cm-2 s-1. The values along the lines of each contour (0.001, 0.004, 0.01, 0.02, 0.04, 0.08) quantify the SE = 100−S difference. The adopted spectral resolution is written in the bottom-right corner of each panel.
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