\begin{table}%t1
\caption{\label{table:1}Logbook of the observations. The JD are given in julian days ($-$2~454~000).}
%\centering
\small
\begin{tabular}{l l l l} 
\hline\hline 
Instrument & SOPHIE     & FEROS      & FOCES      \\
\hline
Resolution  &70~000 &48~000 &35~000 \\
$\rm JD_{start}$ &112.382  &103.657  &  76.618  \\
$\rm JD_{end}$ & 132.336 &128.701 &  78.610 \\
$N_{\rm HD~50747}$ & 14    & 18    &  7 \\
$N_{\rm HD~51106}$ & 13 & 13 & 4 \\
 $S/N$ & 60 & 80 & 60 \\
Observers & PM, JCV & MR, KU & PJA\\
\hline 
\end{tabular}
\end{table}