Fig. 4
LBT/LUCIFER1 J- (left) and H+K-band (right) spectra of WISE J1741+2553 and two other objects (see Table 2). Also shown is a T9 template spectrum from Burningham et al. (2008). A lower resolution spectrum of the T8 template 2MASSI J0415195−093506 (from Burgasser et al. 2004) is overplotted. Arrows mark the candidate NH3 absorption feature, mentioned by Lucas et al. (2010).
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