Fig. 2

Near-IR MKO colours of CFBDSIR2149 (red square) compared to known field T dwarfs. The arrows in z′ − J colours indicates this colour is a lower limit since we have no z′-band detection. Open squares are CFBDS T dwarfs Albert et al. (2011), the plus signs are 111 dwarfs from Knapp et al. (2004), crosses are 73 dwarfs from Chiu et al. (2006) while open triangles are late T dwarfs from Burningham et al. (2008, 2009, 2010), Delorme et al. (2010), and Lucas et al. (2010).
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