Fig. 1.
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Comparison between the archival 2005 SDSS (red curve), the 2022 Cassini/BFOSC (green curve), and the 2024 TNG/LR-B (blue curve) spectra. Fluxes and wavelengths are the observed ones (no Galactic absorption correction has been applied). The absence of the broad Hα line is apparent in both the Cassini/BFOSC and the TNG/LR-B data.
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