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Fig. 19.
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Comparison between spectra at different long phases. The epoch 106 is at bright state (ϕL = 0.844), while the two spectra at ϕ = 509.509 (IUE SWP) and ϕ = 161.496 (LWP) are at faint state (ϕL = 0.587 and ϕL = 0.31). The spectra in the two lower panels are the same as the Al II ones.
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