Integrated H-band spectrum of X_N_115_23 shown here as an example. The grey curve shows the observed spectrum, the red curve shows the reproduced overall emission line model, the blue dashed curve shows the iron emission, and the dashed green curves show the continuum emission and the individual Gaussian components (narrow, broad, and BLR) used to reproduce the profiles of various emission lines. The blue vertical lines indicate the location of Hβ, [O III] λ4959 and [O III] λ5007. The vertical grey regions mark the channels with strong sky lines that were masked during the fitting procedure. The X-axis shows the rest frame wavelength after correcting for the redshift of the target, and the Y-axis shows the observed flux density. The integrated spectra of the rest of the targets are shown in Appendix A.