Correlation matrix from the jackknife covariance between angular bins, evaluated jointly for the three DM threshold samples. Each entry represents the Pearson correlation coefficient ﹩{C}_{ij}/\sqrt{{C}_{ii}{C}_{jj}}﹩. The block structure highlights correlations between separation bins at a fixed DM threshold, while the off-diagonal blocks encode correlations between different DM cuts. These intersample correlations arise naturally because samples with higher DM thresholds are nested within those defined by lower thresholds.