\begin{table} %t5 %\centering \par \caption{Spectral indices of ultracool brown dwarfs.\label{indices}} \begin{tabular}{lcccc} \hline \hline Object &Sp. Type& H$_2$O--H & CH$_4$--H & NH$_3$--H\\ \hline Gl570D& T7.5 & 0.208 & 0.137 & 0.672\\ 2MASS0415& T8 & 0.183 & 0.104 & 0.625\\ WOLF940B&T8+/Y? & 0.141 & 0.091 & 0.537\\ %CFBDSIR1458first-reduc&T8+/Y? & 0.122 & 0.011 & 0.516\\ \hline CFBDSIR1458 (1)&T8+/Y? & 0.149 & 0.046 & 0.568\\ CFBDSIR1458 (2)&T8+/Y? & 0.146 & 0.087 & 0.582\\ ULAS0034 & T8+/Y? & 0.133 & 0.096 & 0.516\\ CFBDS0059& T8+/Y? & 0.119 & 0.084 & 0.526\\ ULAS1335& T8+/Y? & 0.114 & 0.077 & 0.564\\ \hline \end{tabular} \tablefoot{The 2 values for CFBDSIR1458 were derived using a median-binning of the spectra over (1) 17 pixels (resolution $\sim$170); (2) 6 pixels (resolution 500). The other values are from \citet{Burgasser.2006,Warren.2007,Burningham.2008,Delorme.2008a,Burningham.2009}. } \end{table}