Left: as for Fig. 2, but for the epochs of the IRTF observations. The 1-sigma error bar of our spectra is shown for both dates (resolving power λ/Δλ is about 2000). The top spectrum has been offset by +1.0 units along the y-axis for clarity. The red curve on the bottom represents the location of the maximum of Uranus contamination (Sep. 26, 2012), which was subtracted from the spectrum.