Spectral regions around Hα, Hβ, and Hγ. Solid bold lines denote the line intervals measured; for Hβ its central core was also measured separately (dotted). In each case, lines are measured relative to local pseudocontinua marked in red, chosen symmetrically about the line centers. The average spectrum from 100 HARPS-N exposures is plotted as a thin dark line. The intensities are normalized to each local pseudocontinuum.