\begin{table}%t5 
\caption{The standard deviations of the radial velocities
corresponding to the $N_{\rm e}$ different exposures of the $N_{\rm s}
= 5$ suitable standard stars for all combinations of the different
object exposures and suitable standard stars of the stars HD~24970
(A0; cf. Table~\ref{tab:4}; top part) and HD~23268 (A0; bottom
part). The distance-weighted mean radial velocities with their errors
are listed in the final column (in km~s$^{-1}$); time-averaged values,
denoted $\overline{v}_{\rm rad}$, are provided in
Table~\ref{tab:3}. The quantity $\sigma_{\rm r}$ denotes the
repeatability error (Sect.~\ref{subsec:reper}).}
%%\centering
\par
\begin{tabular}{ccccccr} 
\hline\hline 
\multicolumn{1}{r}{HD} & 
\multicolumn{1}{c}{10982} & 
\multicolumn{1}{c}{196724} & 
\multicolumn{1}{c}{196821} & 
\multicolumn{1}{c}{27638} & 
\multicolumn{1}{c}{58142} & 
\multicolumn{1}{c}{$v_{\rm rad}$}\\ 
\multicolumn{1}{r}{SpT} & 
\multicolumn{1}{c}{B9V} & 
\multicolumn{1}{c}{A0V} & 
\multicolumn{1}{c}{A0III} & 
\multicolumn{1}{c}{B9V} & 
\multicolumn{1}{c}{A1V} & 
\multicolumn{1}{c}{}\\ 
\multicolumn{1}{r}{$d=$} & 
\multicolumn{1}{c}{$1.00$} & 
\multicolumn{1}{c}{$0.00$} & 
\multicolumn{1}{c}{$1.00$} & 
\multicolumn{1}{c}{$1.00$} & 
\multicolumn{1}{c}{$1.00$} & 
\multicolumn{1}{c}{}\\ 
\multicolumn{1}{r}{$w=$} & 
\multicolumn{1}{c}{$0.50$} & 
\multicolumn{1}{c}{$1.00$} & 
\multicolumn{1}{c}{$0.50$} & 
\multicolumn{1}{c}{$0.50$} & 
\multicolumn{1}{c}{$0.50$} & 
\multicolumn{1}{c}{}\\ 
\multicolumn{1}{r}{$N=$} & 
\multicolumn{1}{c}{$2$} & 
\multicolumn{1}{c}{$5$} & 
\multicolumn{1}{c}{$3$} & 
\multicolumn{1}{c}{$2$} & 
\multicolumn{1}{c}{$4$} & 
\multicolumn{1}{c}{}\\ 
\multicolumn{1}{r}{$\sigma_{\rm r}=$} & 
\multicolumn{1}{c}{$3.4$} & 
\multicolumn{1}{c}{$2.3$} & 
\multicolumn{1}{c}{$0.9$} & 
\multicolumn{1}{c}{$0.2$} & 
\multicolumn{1}{c}{$2.0$} & 
\multicolumn{1}{c}{}\\ 
\hline 
{\rm Exposure\ } 1*           & 1.8 & 3.4 & 0.4 & 0.2 & 2.7 & $+25.3 \pm 3.3$\\ 
{\rm Exposure\ } 2\phantom{*} & 2.3 & 3.5 & 0.9 & 0.6 & 2.7 & $+23.2 \pm 3.5$\\ 
{\rm Exposure\ } 3\phantom{*} & 2.3 & 3.5 & 0.9 & 0.7 & 2.6 & $+21.0 \pm 3.5$\\ 
\hline		        	    	   	  	 	
{\rm Exposure\ } 1\phantom{*} & 2.1 & 3.5 & 0.8 & 0.1 & 2.6 &  $+3.8 \pm 3.6$\\ 
{\rm Exposure\ } 2\phantom{*} & 2.2 & 3.5 & 1.0 & 0.6 & 2.6 &  $+3.7 \pm 3.6$\\ 
{\rm Exposure\ } 3\phantom{*} & 2.3 & 3.6 & 1.0 & 0.6 & 2.6 &  $+4.8 \pm 3.6$\\ 
\hline 
\end{tabular} 
\label{tab:5} 
\end{table}