Four random samples of our training set, comparing data without normalization (left panels) and data with normalization (right panels) that will be used for our machine-learning network. The red and blue data points are the i-band light curves for the first and the second, respectively, lensed SN image. The black curves in the left panels show the i-band 5σ limiting depth, which oscillates with the moon phase. The normalization procedure to obtain the right panels from the left panels is described in Sect. 2.2.