\begin{table}%t1
%\centering
\par
  \caption{Heliocentric radial velocities in HD 34700 and its companion}\label{t1}
  \begin{tabular}{ccccc}
  \noalign{\smallskip}
  \hline\hline
  \noalign{\smallskip}
  \noalign{\smallskip}
  \multicolumn{1}{c}{Date}&
  \multicolumn{1}{c}{$V_{r,\odot}$ (blue)}&
  \multicolumn{1}{c}{$V_{r,\odot}$ (red)}&
  \multicolumn{1}{c}{$N$}&
  \multicolumn{1}{c}{HJD}\\
  \noalign{\smallskip}
  \multicolumn{1}{c}{}&
  \multicolumn{1}{c}{km~s$^{-1}$}&
  \multicolumn{1}{c}{km~s$^{-1}$}&
  \multicolumn{1}{c}{}&
  \multicolumn{1}{c}{(2 451 000.+)}\\
\par
  \noalign{\smallskip}
  \hline
  \noalign{\smallskip}
  Oct. 6, 2000 & $-27.0\pm 4.3$  & $+69.3\pm 3.9$ & 106 & 823.70130\\
  Oct. 7, 2000 & $-21.0\pm 5.8$  & $+63.6 \pm 5.8$ &  98 & 824.72364\\
  Oct. 8, 2000 & $-9.5\pm 4.6$  & $+53.4 \pm 5.8$ &  80 & 825.66518\\
              \noalign{\smallskip}
              \hline
              \noalign{\smallskip}
\multicolumn{4}{l}{$N = {\rm number}$ of lines included in the calculation.}
  \end{tabular}
  \end{table}