Fig. 17
Hubble diagram residuals for pEW(Si ii λ4130) (top) and ℛ(Si) (bottom) at maximum light. In each case we show the Hubble residuals obtained using SALT2 color and the spectroscopic indicator (upper panels), and using the standard SALT2 fit parameters (x1,c) (lower panels). We also indicate the weighted rms of Hubble residuals (gray highlighted region). For the ℛ(Si) spectroscopic indicator, we report the weighted rms both including and excluding SN 2000dk (open circle).
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