Fig. 3.
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LC fits of the siblings using SNooPy. Left: SN 1974G LCs fits. The orange and blue points correspond to the B- and V-band data taken from Schaefer (1998). The black lines indicate the SNooPy best-fits. Dashed lines are 1-σ errors. Right: SN 2021J LCs fits. The photometry data are obtained from the OSN and Swift. The legend indicates the color and shape of the symbols adopted for the different bands. The black lines indicate the SNooPy best-fits. Dashed lines are 1-σ errors.
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