Fig. 5
Upper panel: comparison between the observed (grey) spectra of V1 and V5 in the C iv doublet region and synthetic spectra combining interstellar and photospheric lines (red). The normalized spectra are shifted along the y axis for better visualization. Lower panel: the region of the C iv (1169 Å) and C iii (≈1176 Å) lines is shown for V1 and V5. A theoretical spectrum is shown in red as comparison.
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