Fig. 13.
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Spectral comparison of SN 2020xga and SN 2022xgc with SLSNe-I from the literature. Left: Comparison of SN 2020xga and SN 2022xgc spectra with typical well-studied SLSNe-I at similar epochs. Right: SN 2020xga and SN 2022xgc spectra in comparison with SLSNe-I that display the second narrow Mg II absorption system. All spectra are corrected for MW extinction and have been smoothed using a Savitzky-Golay filter.
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