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Fig. 3


Medium-resolution NIR spectra of WISE J0720 (left) and the radial velocity standard HD 48381 (right). The different orders are plotted with alternating dark/light blue and red/green colors, respectively. The low-resolution NIR spectrum of WISE J0720 is shown in magenta. For comparison we plot the M9V LP 94420 (left, black) and K0V HD 145675 (right, black) spectra from the IRTF library (Cushing et al. 2005; Rayner et al. 2009), shifted down by 0.9 (top panels), 0.5 (middle) and 0.3 (bottom). All spectra were normalized to unity for λ between 15 000 Å and 17 000 Å.

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