\begin{table}%t2
\caption{\label{specindex}Spectral indices as measured for PHL~5038~B, L8, L9 and T0~fields dwarfs (Burgasser et~al. \cite{bur06}).} 
%\centering
\small  
\begin{tabular}{c c c c c}    
\hline\hline    
Index & PHL~5038~B & 2MASS~1632$+$1904 (L8) & DENIS~0255$-$4700 (L9) & SDSS~0423$-$0414 (T0) \\ \hline                    
H$_{2}$0-$H$ & $0.74\pm0.08$ & 0.71 & 0.69 & 0.64 \\
CH$_{4}$-$H$ & $0.98\pm0.08$ & 1.08 & 1.03 & 0.99 \\
H$_{2}$0-$K$ & $0.76\pm0.14$ & 0.70 & 0.69 & 0.68 \\
CH$_{4}$-$K$ & $0.89\pm0.14$ & 0.88 & 0.84 & 0.82 \\
\hline                             
\end{tabular}
\end{table}