\begin{table}%t1
\caption{\label{trvsb2b}Log of spectroscopic observations and heliocentric radial velocity determinations (when available).}
%\centering
\small 
$$\begin{tabular}{lrccccr@{~$\pm$~}lr@{~$\pm$~}l}
\hline   \hline\noalign{\smallskip}
Date & Time & Exp. time & $S/N$ & HJD  & Phase & \multicolumn{2}{c}{Primary} & \multicolumn{2}{c}{Secondary} \\
& $[$UT$]$& $[$s$]$ & & & & \multicolumn{2}{c}{[km~s$^{-1}$]} & \multicolumn{2}{c}{[km~s$^{-1}$]} \\
\hline
2004 Nov. 7 & 10:14 & 4100 & 22 & 2~453~316.931 & 0.272 & --370.1 & 8.2 & 143.5 & 30.3 \\
2004 Sep. 15 & 13:29 & 4100 & 11 & 2~453~264.066 & 0.467 & \multicolumn{2}{c}{\ldots} & \multicolumn{2}{c}{\ldots}\\
2005 Feb. 12 & 5:39 & 3240 & 8 & 2~453~413.734 & 0.524 & \multicolumn{2}{c}{\ldots} & \multicolumn{2}{c}{\ldots}\\
2004 Nov. 12 & 7:35 & 4100 & 15 & 2~453~321.820 & 0.659 & 14.3 & 13.9 & --414.1 & 25.5 \\
2004 Nov. 12 & 8:49 & 4100 & 16 & 2~453~321.872 & 0.684 & 57.3 & 13.5 & --448.2 & 24.8 \\
2004 Nov. 10 & 9:00 & 4100 & 24 & 2~453~319.879 & 0.711 & 30.6 & 9.9 & --455.5 & 17.4 \\
2004 Sep. 14 & 8:53 & 4100 & 20 & 2~453~262.874 & 0.885 & \multicolumn{2}{c}{\ldots} & \multicolumn{2}{c}{\ldots}\\
2004 Sep. 12 & 9:45 & 4100 & 13 & 2~453~260.910 & 0.927 & --69.7 & 18.1 & --309.2 & 19.4 \\
2004 Oct. 17 & 6:31 & 4100 & 14 & 2~453~295.776 & 0.946 & --58.1 & 24.2 & --271.7 & 22.9 \\
\hline
\end{tabular}$$
\end{table}