Spectral comparison of AT 2018hso and AT 2019abn. Left: spectral evolution at three representative phases: ∼12 ± 1 d (top), ∼45 ± 5 d (middle), and ≥200 d (bottom). The molecular bands are identified in the left bottom panel. The [Ca II] doublet is marked with a shaded grey region in the three left panels. Right: zoom-in of the [Ca II] doublet profile at the same phases. Phases are from their r-band maximum.
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