Fig. 4

GTC/OSIRIS optical spectrum of 2MASS J0249−0557 c (black) compared to old field optical L standards from Kirkpatrick et al. (1999, 2000) observedwith Keck-I/LRIS (coloured). LRIS spectra were convolved with a Gaussian to match the OSIRIS spectrum resolution. Spectra were normalised at wavelength ~9200 Å and shifted by a constant for clarity. Several spectral features are marked in grey.
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