Effective number of spectral flux measurements constraining the G10 SALT-II model shown as a function of wavelength. Four different phases are displayed: −12.5 days (dash–dotted line), 0.5 days (dashed line), 16.5 days (dash–dot–dotted line), and 26.0 days (dotted line). The solid line shows the value above which the regularization weight W(p, λ) is set to zero.