Fig. 1.

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Histograms (upper left) and cumulative distributions (lower left) of g − r color at the time of r-band maximum, (g − r)rmax, for SNe Ib and Ic, those without narrow lines, SNe Ibn and Icn, and (potential) FBOTs from Ho et al. (2023). The contributions from SNe Ibn and Icn are marked differently as “//” hatching (upper left) and dashed lines (lower left). The lower right panel shows differences between the SNe Ib and Ic cumulative distributions as a function of a quantile (Δq(g − r)rmax), for the full sample and for the subsample without narrow lines. Positive values mean that SNe Ib are bluer than SNe Ic. Solid lines show the nominal differences, and shaded regions indicate the 1-σ bootstrap uncertainty. The vertical dashed line marks zero difference.
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