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Fig. 2

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Details in the PG 1115+158 spectrum. Top panel: C ii 1330/1334 Å photospheric lines and blueshifted interstellar components. The vertical axis in all panels is the observed energy flux Fλ [erg cm-2 s-1 Å-1] with zero at the bottom of each panel. Middle panel: Si ii 1260/1264/1265 Å photospheric lines and ISM component to the 1260 Å line. Bottom panel: Lyman α, Si ii (11901197, 12221229) and Si iii 1206 Å lines. The lines near 1199 Å are interstellar N i. The continuous red line is the theoretical model.

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