\begin{table}%t1
\caption{\label{tab:bds}{\it RV}s for BDs and VLMSs (M6$-$M8) in Cha~I.
Given are the date of the observation,
heliocentric Julian day (HJD) at the middle of the exposure,
the measured {\it RV}~and the estimated error $\sigma_{{\it RV}}$ of the relative {\it RV}s.
The asterisk marks {\it RV}s based on the average of two single measurements for which 
the errors are standard deviations.
The last column gives the weighted mean {\it RV}~for the individual objects and the 
error of this mean, which takes into account an uncertainty of 400~m~s$^{-1}$ for the
zero point of the velocity.  
}
%\centering
\par
\begin{tabular}{lcccl|l}
\hline
\hline
Object             &   Date   & HJD & {\it RV}~  &  $\sigma_{{\it RV}}$          & $\overline{{\it RV}}$ \\
                   & & & [km~s$^{-1}$] & [km~s$^{-1}$]             & [km~s$^{-1}$] \\
\hline
Cha~H$\alpha$~1    & 2000 Apr.  04 & 2~451~638.56395 & 16.167 & ~0.53 \\ 
		     & 2000 Apr.  24 & 2~451~658.57346 & 16.648 & ~0.67 & 16.35 $\pm$ 0.63 \\
\hline
Cha~H$\alpha$~2    & 2000 Apr.  04 & 2~451~638.59431 & 16.015 & ~0.50 \\
		     & 2000 Apr.  24 & 2~451~658.60407 & 16.282 & ~0.56 & 16.13 $\pm$ 0.53 \\
\hline
Cha~H$\alpha$~3    & 2000 Apr.  04 & 2~451~639.49340 & 14.357 & ~0.45 \\
		     & 2000 Apr.  24 & 2~451~658.61991 & 14.758 & ~0.45 & 14.56 $\pm$ 0.60 \\
\hline 
Cha~H$\alpha$~4    
		   & 2000 Mar. 14   & 2~451~617.73646 & 14.909 & ~0.38~* \\
\par
		   & 2000 Mar. 24   & 2~451~627.80388 & 14.866 & ~0.19~* \\
\par
		   & 2000 Mar. 31   & 2~451~635.51085 & 14.773 & ~0.14 \\ 
\par
	           & 2000 Apr.  23   & 2~451~658.52150 & 14.908 & ~0.05~* \\
\par
	           & 2000 May 22   & 2~451~687.50595 & 14.830 & ~0.08~* & 14.82 $\pm$ 0.40\\
\par
	    	   & 2002 Jan. 17   & 2~452~291.78912 & 14.949 & ~0.48~* \\
\par
		   & 2002 Jan. 18   & 2~452~292.82508 & 14.754 & ~0.12~* \\
\par
         	   & 2002 Jan. 24   & 2~452~298.70540 & 14.635 & ~0.08~* \\
\par
		   & 2002 Feb. 02   & 2~452~307.71979 & 15.064 & ~0.39~* \\ 
\par
		   & 2002 Feb. 04   & 2~452~309.74222 & 14.821 & ~0.001~* \\
\par
		   & 2002 Feb. 13   & 2~452~318.71915 & 14.985 & ~0.07~* \\
\hline
Cha~H$\alpha$~5    & 2000 Apr.  05 & 2~451~639.51485 & 15.499 & ~0.45 \\
		     & 2000 Apr.  24 & 2~451~658.63522 & 15.446 & ~0.42 & 15.47 $\pm$ 0.43\\
\hline
Cha~H$\alpha$~6    & 2000 Apr.  05 & 2~451~639.58967 & 16.093 & ~0.50 \\
		     & 2000 Apr.  24 & 2~451~658.65099 & 16.652 & ~0.50 & 16.37 $\pm$ 0.68\\
\hline
Cha~H$\alpha$~7    & 2000 Apr.  05 & 2~451~639.55225 & 16.513 & ~0.56 \\
		     & 2000 Apr.  24 & 2~451~658.68756 & 17.664 & ~0.56 & 17.09 $\pm$ 0.98\\
\hline
Cha~H$\alpha$~8    & 2000 Apr.  05 & 2~451~639.61095 & 14.787 & ~0.50 & \\
		     & 2000 Apr.  24 & 2~451~658.72597 & 14.935 & ~0.50 & 14.86 $\pm$ 0.47 (2000)\\
                     & 2002 Mar. 06 & 2~452~339.68965 & 16.920 & ~0.07~* \\ 
                     & 2002 Mar. 22 & 2~452~355.65264 & 16.912 & ~0.16~* \\
                     & 2002 Apr.  16 & 2~452~380.61646 & 17.551 & ~0.23~* & \\              
                     & 2002 Apr.  19 & 2~452~383.57565 & 17.379 & ~0.03~* & 17.30 $\pm$ 0.50 (2002)\\
\hline
Cha~H$\alpha$~12   & 2000 Apr.  05 & 2~451~639.63487 & 15.021 & ~0.50 \\
		     & 2000 Apr.  25 & 2~451~659.59469 & 13.905 & ~0.53 & 14.50 $\pm$ 0.96\\
\hline
\end{tabular}
\end{table}