\begin{table}%t3
\caption {\label{tab:rvorbit1}\label{tab:rvorbit2}Best-fitting spectroscopic orbits found using {\sc sbop}. }
%\centerline
 {\begin{tabular}{l c}
\hline\hline
Orbital period (d)              & 0.18591324 (fixed)        \\
Eccentricity                    & 0.0 (fixed)               \\
\hline
\multicolumn{2}{l}{{\it Emission-line radial velocities}:}    \\
Reference time (HJD)            & 2454497.6411 $\pm$ 0.0023 \\
Velocity amplitude $K_1$ (\kms) & 127.1 $\pm$ 4.6           \\
Systemic velocity (\kms)        & $-$20.2 $\pm$ 6.0         \\
$\sigma_{\rm rms}$ (\kms)       & 20.1                      \\
\hline
\multicolumn{2}{l}{{\it Absorption-line radial velocities}:}  \\
Reference time (HJD)            & 2454497.63381 (fixed)     \\
Measured $K_2$ (\kms)           & 276 $\pm$ 7               \\
Corrected $K_{\rm MD}$ (\kms)   & 258 $\pm$ 12              \\
Systemic velocity (\kms)        & $-$20 $\pm$ 10            \\
$\sigma_{\rm rms}$ (\kms)       & 20.8                      \\
\hline \end{tabular} }
\par
\smallskip
The reference
times are time of maximum negative rate of change of~RV. The uncertainties
include both random and systematic contributions.
\vspace*{-3mm}
\end{table}