Spearman’s rank correlation coefficients (ρ) between pairs of velocity (−v_abs) measurements. The color indicates the correlation coefficients with numeric values connected to colors as indicated by the mapping of the colorbar at the top of the figure. The lighter the color, the stronger the correlation. Contained within the triangle of each panel are the correlation coefficients between −v_abs pairs computed from spectra obtained within the first three weeks relative to the time of B-band maximum. To highlight the relative significance of the Spearman’s rank correlation coefficient each of the squares are marked with a different white line where the white dotted, white dashed and white solid lines indicate −v_abs pairs of low (0.4< |ρ| ≤0.6), moderate (0.6< |ρ| ≤0.8), and high (0.8< |ρ|) correlation coefficients, respectively. Gray squares are correlations of low statistical significance characterized by probability values (p-values) > 0.1.