Two portions of the continuum-normalized spectrum of HN Tau A (black solid line) in the HK bands, with the rotationally broadened and veiled spectrum of the stellar template overplotted (red dashed line). Absorption features, mainly of the iron-peak group, are indicated with small vertical lines. We refer to Rayner et al. (2009) for the details on the absorption features. Emission lines such as the H₂ line, indicated with the blue dotted lines, are excluded from the analysis. The value of veiling, which minimizes residuals with respectof the rotationally broadened and veiled template, is indicated in the lower left.