\begin{table}%t3
%\centering
\par
\caption{\label{t-rv} Radial velocities of the \Ha\ emission line determined from
a single-Gaussian fit to the line profile (corrected for the
heliocentric velocity).}
%\begin{tabular}{lrllrllrl}
$$
\begin{tabular}{lr@{.}lclr@{.}lclr@{.}lc}
\hline\hline\noalign{\smallskip}
HJD           &\multicolumn{2}{c}{$RV$}& $RV$ error & HJD         &\multicolumn{2}{c}{$RV$}& $RV$ error & HJD &\multicolumn{2}{c}{$RV$}& $RV$ error \\
--2~450~000 &\multicolumn{2}{c}{[\kms]}& [\kms] & --2~450~000 &\multicolumn{2}{c}{[\kms]}& [\kms] & --2~450~000 &\multicolumn{2}{c}{[\kms]}& [\kms] \\
\hline\noalign{\smallskip}
%
617.5515 &  42&7 &  9.3 &    623.5093 & $-$31&0 &   6.0  &   624.4842 &   1&6 &  6.0 \\
617.5598 &  61&9 &  8.5 &    623.6290 &  24&3 &   4.8  &   624.5729 & $-$54&7 &  5.5 \\
621.6740 &  48&7 &  5.3 &    623.6368 &  42&1 &   4.2  &   624.5807 & $-$51&5 &  5.4 \\
621.6847 &  35&4 &  5.9 &    623.6446 &  64&0 &   5.0  &   624.5884 & $-$16&3 &  6.4 \\
621.6925 &  27&2 &  6.0 &    623.6524 &  65&4 &   6.0  &   624.5962 & $-$21&8 &  6.3 \\
621.7003 &  24&9 &  6.5 &    623.6601 &  64&9 &   7.1  &   624.6040 &  11&6 &  6.3 \\
621.7085 &  14&4 &  6.2 &    623.7279 & $-$48&5 &   4.2  &   637.4651 & $-$51&3 &  5.7 \\
621.7162 &   5&2 &  5.1 &    623.7357 & $-$61&2 &   3.8  &   637.4729 & $-$82&4 &  5.7 \\
621.7240 &  $-$9&8 &  4.8 &    623.7434 & $-$88&2 &   3.9  &   637.4807 & $-$85&1 &  4.5 \\
621.7318 & $-$12&1 &  4.6 &    623.7512 & $-$84&6 &   3.8  &   637.5538 & $-$69&1 &  4.1 \\
621.7425 & $-$20&8 &  5.4 &    623.7590 & $-$88&2 &   4.0  &   637.5616 & $-$33&9 &  4.7 \\
623.4760 &   8&3 &  7.6 &    624.4531 &  26&7 &   7.2  &   637.5694 & $-$28&9 &  4.5 \\
623.4838 &   6&9 &  7.4 &    624.4609 &  26&7 &   7.0  &   637.6690 & $-$45&4 &  4.5 \\
623.4915 &   6&0 &  5.6 &    624.4687 &  31&7 &   7.0  &   637.6768 & $-$61&9 &  4.7 \\
623.5007 & $-$10&9 &  6.1 &    624.4764 &  18&9 &   6.2  &   637.6846 & $-$66&9 &  3.9 \\
\hline\noalign{\smallskip}
\end{tabular}
$$
\end{table}