\begin{table}%t3 
\caption{Radial velocities for 29 target stars. Each star occupies
$N$ lines, with $N$ the number of spectra/exposures obtained
(Table~\ref{tab:1}). Columns:
(1) HD number; 
(2) spectral type and luminosity class; 
(3) multiplicity (SB: spectroscopic binary; C: Hipparcos component 
    binary; G: Hipparcos acceleration binary; S: Hipparcos suspected 
    non-single -- field H61); 
(4) the number of suitable standard stars $N_{\rm s}$ and, between 
    brackets, the associated total number of exposures $N_{\rm e}$
    (Sect.~\ref{subsec:mismatch_ststsel}); 
(5) the average distance to the $N_{\rm s}$ standard stars
    (Sect.~\ref{subsec:results}); 
(6) exposure number ($1,\ldots,N$; asterisks denote suspect 
    exposures related to detector instability -- see
    Sect.~\ref{sec:data_reduction} for details); 
(7) heliocentric Julian date of the mid-point of the exposure (HJD 
    24507XX.XXXXX); 
(8) final distance-weighted radial velocity $v_{\rm rad}$ 
    (km~s$^{-1}$; Eq.~(\ref{eq:v_rad}) in Sect.~\ref{subsec:mismatch_ststsel}); 
(9) corresponding standard deviation $\sigma_{v,{\rm rad}}$ 
    (km~s$^{-1}$; Sect.~\ref{subsec:results}); 
(10) time-averaged radial velocity $\overline{v}_{\rm rad}$ using the 
     $N$ exposures (km~s$^{-1}$; spectroscopic binaries show a dash;
     Sect.~\ref{subsec:results}); 
(11) corresponding standard deviation $\sigma_{\overline{v},{\rm 
     rad}}$ (km~s$^{-1}$; values smaller than $2.0$~km~s$^{-1}$ are 
     optimistic; Sect.~\ref{subsec:results}); 
(12) literature radial velocity (km~s$^{-1}$); 
(13) source of literature radial velocity (Col.~12) and remarks 
     (B52: Blaauw \cite{Bla52}; BvA: Blaauw \& van Albada \cite{Blaa63}; Z83: Zentelis 
     \cite{Zen83}).\label{tab:3} }
 %%\centering
\par
\begin{tabular}{rllcccrrrrrrl} 
\hline\hline 
\multicolumn{1}{c}{HD} & 
\multicolumn{1}{c}{SpT} & 
\multicolumn{1}{c}{Mult.} & 
\multicolumn{1}{c}{$N_{\rm s}$($N_{\rm e}$)} & 
\multicolumn{1}{c}{$\overline{d}$} & 
\multicolumn{1}{c}{Expos.} & 
\multicolumn{1}{c}{HJD} & 
\multicolumn{1}{c}{$v_{\rm rad}$} & 
\multicolumn{1}{c}{$\sigma_{v,{\rm rad}}$} & 
\multicolumn{1}{c}{$\overline{v}_{\rm rad}$} & 
\multicolumn{1}{c}{$\sigma_{\overline{v},{\rm rad}}$} & 
\multicolumn{1}{c}{$v_{\rm lit}$} & 
\multicolumn{1}{l}{Remark}\\ 
\multicolumn{1}{c}{(1)} & 
\multicolumn{1}{c}{(2)} & 
\multicolumn{1}{c}{(3)} & 
\multicolumn{1}{c}{(4)} & 
\multicolumn{1}{c}{(5)} & 
\multicolumn{1}{c}{(6)} & 
\multicolumn{1}{c}{(7)} & 
\multicolumn{1}{c}{(8)} & 
\multicolumn{1}{c}{(9)} & 
\multicolumn{1}{c}{(10)} & 
\multicolumn{1}{c}{(11)} & 
\multicolumn{1}{c}{(12)} & 
\multicolumn{1}{l}{(13)}\\ 
\hline 
18830  & A0      & C    & 5(16) & 0.69 & 1\phantom{*} & 61.34014 &   5.1 & 3.2 &   3.8 &   1.5 & $10.5 \pm 5.6$ & Grenier et~al. (\cite{Gre99})\\ 
       &         &      & 5(16) & 0.69 & 2\phantom{*} & 61.36894 &   2.2 & 3.4 &       &        &                &\\ 
       &         &      & 5(16) & 0.69 & 3\phantom{*} & 61.39773 &   4.1 & 3.3 &       &        &                &\\ 
19216  & B9V     &      & 6(16) & 0.69 & 1\phantom{*} & 66.49641 &   7.8 & 3.4 &   8.9 &   1.3  & $ 4.5 \pm 2.7$ & Grenier et~al. (\cite{Gre99})\\ 
       &         &      & 6(16) & 0.69 & 2\phantom{*} & 66.52524 &  10.3 & 3.5 &       &        &                &\\ 
       &         &      & 6(16) & 0.69 & 3\phantom{*} & 66.55355 &   8.7 & 3.6 &       &        &                &\\ 
19567  & B9      &      & 6(16) & 0.69 & 1\phantom{*} & 54.62964 &   1.7 & 3.6 &   2.6 &   1.3  &                &\\ 
       &         &      & 6(16) & 0.69 & 2*           & 54.65873 &   3.5 & 3.8 &       &        &                &\\ 
20113  & B8      &      & 4( 9) & 0.67 & 1\phantom{*} & 66.58191 &   6.1 & 4.7 &   6.2 &   2.4  &                &\\ 
       &         &      & 4( 9) & 0.67 & 2\phantom{*} & 66.61018 &   4.3 & 4.8 &        &       &                &\\ 
       &         &      & 4( 9) & 0.67 & 3*           & 66.63902 &   4.7 & 5.2 &        &       &                &\\ 
       &         &      & 4( 9) & 0.67 & 4\phantom{*} & 66.66758 &   9.5 & 4.3 &        &       &                &\\ 
20987  & B2V     & G    & 3( 7) & 0.34 & 1\phantom{*} & 54.68775 &$-22.6$& 5.7 &$-22.1$ &   0.8 &                & SpT from Abt (\cite{Abt85})\\ 
       &         &      & 3( 7) & 0.34 & 2\phantom{*} & 54.71652 &$-21.5$& 4.5 &        &       &                &\\ 
21483  & B3III   &      & 4( 8) & 1.05 & 1\phantom{*} & 66.36154 & $-4.0$& 3.5 & $-3.6$&   0.5  & $-6.0 \pm 0.5$ & B52\\ 
       &         &      & 4( 8) & 1.05 & 2*           & 66.39006 & $-3.2$& 3.5 &        &       &                &\\ 
21856  & B1V     &      & 4(10) & 0.86 & 1\phantom{*} & 65.36623 &  29.7 & 3.3 &  29.7  &   3.3 & $31.5 \pm 3.0$ & Z83\\ 
22114  & B8Vp    &      & 4( 9) & 0.67 & 1\phantom{*} & 65.67265 &   4.7 & 3.2 &   6.1  &   1.9 &                &\\ 
       &         &      & 4( 9) & 0.67 & 2*           & 65.70122 &   7.4 & 3.4 &        &       &                &\\ 
22951  & B0.5V   & S    & 4( 9) & 1.11 & 1\phantom{*} & 62.38453 &  19.3 & 6.3 &  19.3  &   6.3 & $19.6 \pm 3.0$ & Z83\\ 
23060  & B2Vp    &      & 5(10) & 0.55 & 1\phantom{*} & 65.41966 &  19.2 & 4.0 &  21.1  &   2.6 & $28.5 \pm 0.9$ & BvA\\ 
       &         &      & 5(10) & 0.55 & 2\phantom{*} & 65.44917 &  22.9 & 4.0 &        &       &                &\\ 
23180  & B1III   & C+SB & 4(10) & 1.00 & 1*           & 63.61336 & $-6.1$& 3.3 &     -- &     --& $12.2 \pm 0.5$ & Stickland \& Lloyd (\cite{Sti98})\\ 
       &         &      & 4(10) & 1.00 & 2\phantom{*} & 63.65607 &   6.4 & 3.1 &        &       &                &\\ 
       &         &      & 4(10) & 1.00 & 3\phantom{*} & 65.34880 &  80.2 & 4.2 &        &       &                &\\ 
23268  & A0      &      & 5(16) & 0.69 & 1\phantom{*} & 55.42518 &   3.8 & 3.6 &   4.1  &   0.6 &$-20.0 \pm 8.5$ & Duflot et~al. (\cite{Duf95})\\ 
       &         &      & 5(16) & 0.69 & 2\phantom{*} & 55.45426 &   3.7 & 3.6 &        &       &                &\\ 
       &         &      & 5(16) & 0.69 & 3\phantom{*} & 55.48318 &   4.8 & 3.6 &        &       &                &\\ 
\hline 
\hline 
23478  & B3IV... &      & 4( 8) & 0.79 & 1\phantom{*} & 65.39109 &  15.8 & 4.0 &  15.8 &   4.0 & $25.1 \pm 3.0$ & Z83; BvA: $16.4 \pm 1.1$\\ 
23597  & B8      &      & 4( 9) & 0.67 & 1\phantom{*} & 65.55700 &  17.0 & 4.9 &  16.0 &   2.6 &                &\\ 
       &         &      & 4( 9) & 0.67 & 2*           & 65.58543 &  13.0 & 4.9 &       &       &                &\\ 
       &         &      & 4( 9) & 0.67 & 3\phantom{*} & 65.61373 &  17.9 & 4.8 &       &       &                &\\ 
23625  & B2.5V   & C+SB & 5(10) & 0.76 & 1\phantom{*} & 62.40834 &   1.7 & 3.0 &    -- &    -- & $20.0 \pm 1.0$ & Blaauw \& van Hoof (\cite{Blah63})\\
23802  & B5Vn    & C    & 1( 2) & 0.00 & 1\phantom{*} & 54.35920 &$-53.8$& 1.8 &$-52.3$&   6.2 &                & SpT from Guetter (\cite{Gue77})\\ 
       &         &      & 1( 2) & 0.00 & 2\phantom{*} & 54.38800 &$-57.6$& 2.6 &       &       &                &\\ 
       &         &      & 1( 2) & 0.00 & 3\phantom{*} & 54.41664 &$-45.5$& 0.1 &       &       &                &\\ 
24012  & B5      &      & 2( 3) & 0.37 & 1\phantom{*} & 54.44633 &  26.4 & 1.0 &  26.8 &   0.5 & $36.9 \pm 1.7$ & BvA; SpT from BvA\\ 
       &         &      & 2( 3) & 0.37 & 2\phantom{*} & 54.47538 &  27.1 & 1.1 &       &       &                &\\ 
24131  & B1V     &      & 4(10) & 0.86 & 1*           & 63.57544 &  26.6 & 3.8 &  25.8 &   1.2 & $23.2 \pm 2.7$ & Z83\\ 
       &         &      & 4(10) & 0.86 & 2*           & 63.59810 &  24.9 & 3.6 &       &       &                &\\ 
24190  & B2V     & SB   & 5(10) & 0.55 & 1\phantom{*} & 62.56051 &  21.3 & 4.6 &    -- &    -- & $26.7 \pm 5.8$ & Lucy \& Sweeney (\cite{Luc71})\\ 
       &         &      & 5(10) & 0.55 & 2*           & 62.58902 &  22.2 & 4.6 &       &       &                &\\ 
24398  & B1Ib    &      & 1( 3) & 1.12 & 1\phantom{*} & 62.37038 &  20.1 & 1.2 &  20.1 &   1.2 & $21.6 \pm 4.1$ & Z83\\ 
24583  & B7V     &      & 4( 7) & 1.06 & 1\phantom{*} & 55.55760 &  25.7 & 4.7 &  26.2 &   5.7 & $25.4 \pm 1.4$ & BvA; SpT from Guetter (\cite{Gue77})\\ 
       &         &      & 4( 7) & 1.06 & 2\phantom{*} & 55.58646 &  26.7 & 4.8 &       &       &                &\\ 
       &         &      & 4( 7) & 1.06 & 3\phantom{*} & 55.61537 &  19.9 & 4.5 &       &       &                &\\ 
       &         &      & 4( 7) & 1.06 & 4\phantom{*} & 55.64456 &  35.2 & 4.8 &       &       &                &\\ 
       &         &      & 4( 7) & 1.06 & 5\phantom{*} & 55.67345 &  23.6 & 5.0 &       &       &                &\\ 
24640  & B1.5V   & S    & 5(12) & 0.87 & 1\phantom{*} & 63.45678 &  22.9 & 4.1 &  22.9 &   4.1 & $17.7 \pm 0.7$ & BvA\\ 
24970  & A0      &      & 5(16) & 0.69 & 1*           & 55.33716 &  25.3 & 3.3 &  23.2 &   2.2 & $20.4 \pm 0.3$ & Z83\\ 
       &         &      & 5(16) & 0.69 & 2\phantom{*} & 55.36676 &  23.2 & 3.5 &       &       &                &\\ 
       &         &      & 5(16) & 0.69 & 3\phantom{*} & 55.39538 &  21.0 & 3.5 &       &       &                &\\ 
25539  & B3V     &      & 4( 8) & 0.89 & 1\phantom{*} & 62.43707 &  19.0 & 3.6 &  19.0 &   3.6 & $23.8 \pm 0.3$ & Z83\\ 
25799  & B3V...  & SB   & 4( 8) & 0.89 & 1\phantom{*} & 62.48414 &  38.3 & 4.0 &    -- &    -- & $24.3 \pm 0.8$ & Morris et~al. (\cite{Mor88})\\ 
       &         &      & 4( 8) & 0.89 & 2\phantom{*} & 62.51369 &  38.4 & 3.9 &       &       &                &\\ 
25833  & B5V:p   & C+SB & 2( 3) & 0.37 & 1*           & 63.53867 &  31.6 & 1.2 &    -- &    -- & $24.7 \pm 0.9$ & Popper (\cite{Pop74})\\ 
26499  & B9      &      & 6(16) & 0.69 & 1\phantom{*} & 54.57089 &  21.8 & 3.6 &  20.3 &   2.2 &                &\\ 
       &         &      & 6(16) & 0.69 & 2\phantom{*} & 54.60061 &  18.7 & 3.6 &       &       &                &\\ 
278942 & B3III   & C    & 2( 3) & 0.37 & 1\phantom{*} & 66.43613 &  30.8 & 2.5 &  31.4 &   0.8 &                & SpT from Cernis (\cite{Cer93})\\
       &         &      & 2( 3) & 0.37 & 2\phantom{*} & 66.46811 &  32.0 & 2.8 &       &       &                &\\ 
281159 & B5V     & C    & 2( 3) & 0.37 & 1\phantom{*} & 65.49889 &   9.1 & 1.8 &   8.5 &   0.9 &                & $v_{\rm rad}$ variable\\ 
       &         &      & 2( 3) & 0.37 & 2\phantom{*} & 65.52757 &   7.8 & 2.1 &       &       &                &\\ 
\hline
\end{tabular} 
\end{table}