$\star$ Residuals according to the color

Figure 10.22 bellow on the left presents the value of the residuals at the diagram of Hubble according to the color to the maximum. We see that there remains a significant correlation, mainly due to one of the close supernovæ, however, we note that the residuals for the remote supernovæ do not seem to depend on the color. In particular, this confirms that we have probably a problem in the estimate of the color of 2001gn.