Spectrum taken in May and a model using an [Ni II] NLTE atom (magenta) with a line width of 11 000 (±2100) km s⁻¹ redshifted by 800 km s⁻¹ from the laboratory rest frame. In the 1.8–2 μm region weak [Fe II] lines (blue) and [Co II] lines (green) are also present. Shortwards of the central wavelength of this line the transmission is low and the noise in the spectrum increases (grey shaded region). This region has not been used in the fitting algorithm.