\begin{table}%t2
\caption{\label{ind}Field-dwarf- and gravity-independent spectral indices\tablefootmark{a} (left and right parts of the table, respectively).} 
\par
%\centering
\par
\begin{tabular}{c c c c c c c c c c c}
\hline\hline       \noalign{\smallskip} 
Object   & sHJ  & sKJ  & sH$_{2}$O$^{J}$ & sH$_{2}$O$^{H1}$ & sH$_{2}$O$^{B}$ & $\langle$SpT$ \rangle$\tablefootmark{b} &  H$_{2}$O 1.5~$\mu$m &  H$_{2}$O & H$_{2}$O-2 & $\langle$SpT$\rangle$\tablefootmark{b}  \\ 
& {\scriptsize (1.265--1.305,}  & {\scriptsize (1.265--1.305,}  & {\scriptsize (1.09--1.13,}   & {\scriptsize (1.45--1.48,} & {\scriptsize (1.47--1.49,} &  & {\scriptsize (1.46--1.48,} &  {\scriptsize (1.492--1.502,}   & {\scriptsize (2.035--2.045,} &  \\ 
& {\scriptsize 1.60--1.70)}    & {\scriptsize 2.12--2.16)}    & {\scriptsize 1.265--1.305)} & {\scriptsize 1.60--1.70)} & {\scriptsize 1.59--1.61)} &  & {\scriptsize 1.57--1.59)} &  {\scriptsize 1.55--1.56)} & {\scriptsize 2.145--2.155)} &  \\ 
\hline
BRB~17   & 0.23; L2.4 & 0.63; L2.6 & ...& ... & ... &  (L2.5)   & ... & 1.22; L0.6 & 0.95; M8.4  & (M9.5) \\
PLIZ~28  & 0.12; L4.5 & 0.51; L4.0 & 0.21; L3.0  & 0.35; L2.0 & 0.78; L0.8  & (L3)   & 1.30; L1 & 1.17; M9.5 & 0.88; L0.3  & (L0.5) \\
PLIZ~35  & 0.21; L2.7 & 0.66; L2.2 & 0.09; L1.2  & 0.37; L2.3 & 0.79; L0.6  & (L2)   & 1.31; L1 & 1.36; L4.0 & 0.80; L2.6  & (L2.5) \\
BRB~21   & 0.19; L3.1 & 0.55; L3.5 & 0.35; L5.2  & 0.38; L2.4 & 0.67; L3.6  & (L3.5) & 1.39; L2 & 1.42; L5.2 & 0.89; L0.0  & (L2.5) \\
BRB~23   & 0.18; L3.4 & 0.55; L3.5 & 0.29; L4.3  & 0.58; L5.0 & 0.58; L6.2  & (L4.5) & 1.67; L7 & 1.51; L7.2 & 0.79; L2.8  & (L5.5) \\
BRB~29   & ...        & ...        & ...         & 0.65; L5.8 & 0.68; L3.4  & (L4.5) & 1.56; L5 & 1.25; L1.3 & 0.68; L5.6  & (L4) \\
\hline                  
\end{tabular}
\tablefoot{\tablefoottext{a}{Their spectral ranges in $\mu$m are also indicated.} \tablefoottext{b}{Average spectral types derived from the spectral indices are approximated to the nearest half subclasses.}}
\vspace*{6mm}\end{table}