H-band spectra of the Z CMa HBe (top) and FUOR (bottom) components during the outburst phase (black line; SINFONI spectrum from February 6, 2009) and in the quiescent stage (golden line; OSIRIS spectrum from December 22, 2009). The fluxes of the OSIRIS spectra are normalized to the median flux of the SINFONI spectra between 1.66 and 1.70 μm and shifted to lower values for clarity.