Left: three portions in the YHK bands of the GIANO spectrum of XZ Tau (solid black line) with the rotationally-broadened and veiled spectrum of the M2 template (dashed red line) overplotted in the same wavelength ranges. Absorption features, mainly of the iron-peak group, are indicated with short lines. We refer interested readers to Rayner et al. (2009) and Sharon et al. (2010) for more details about absorption features. In the bottom panel, ¹²CO and ¹³CO molecular bands are represented by a horizontal line. Main emission features are marked and excluded from the analysis. Right: the same for DR Tau in three different wavelength regions, with the dashed red line representing the K7 template.