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Fig. 6.
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Fitting the empirical formula of Takáts & Vinkó (2012) (Eq. 5) to the measured photospheric velocity (4000 km s−1) of SN 2020dpw (red dot). The orange and brown markers represent the 3500 and 4500 km s−1 test points, which were used to estimate the uncertainty of the v50 value.
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