NIR spectra of SN 2014J (for the three nights it was observed). The spectra are plotted in mJy for visibility and each spectrum is incrementally displaced vertically by 2 mJy. The March data are at top and the May data at the bottom. The regions of poor atmospheric transmission around 1.4 and 1.9 μm are clearly identifiable due to the increased noise. The inset shows the region between 1.85 and 2.03 μm (the expected region for the [Ni II] feature) in the March spectrum.