\begin{table}%T1
\caption{
Observing logbook of our spectroscopic observations of~\bcma.
\label{tab:log}
}
\small%\centering
\par
\begin{tabular}{ccc}
\hline
\hline
Number of    & \multicolumn{2}{c}{JD} \\
observations & \multicolumn{2}{c}{2~450~000 +}   \\
             & Start & End \\
\hline
22           & 1591  & 1598 \\
26           & 1654  & 1660 \\
70           & 1882  & 1894 \\
62           & 1940  & 1953 \\
60           & 2227  & 2239 \\
27           & 2569  & 2582 \\
\phantom{0}2 & 2624  & 2624 \\
91           & 2983  & 2994 \\
54           & 3072  & 3085 \\
38           & 3271  & 3283 \\
\hline
\end{tabular}
\end{table}