\begin{table}%t1
\caption{\label{table:obs}Summary of the observations, giving the total number of
exposures, $N$, the integrated exposure time in seconds, and the
observed heliocentric velocities of the absorbing clouds,
$V_{\odot}$.}
%\centering
\par
\begin{tabular}{lrrrrrr}
\hline\hline
Object       & \multicolumn{3}{c}{Air mass} & $N$  &  Exp.    &     $V_{\odot}$     \\
             &   14/06 &  15/06 &  16/06      &         &     time   &  km~s$^{-1}$    \\
\hline
$\zeta$~Oph  & 1.16 &   1.81 &   1.71 &150    & 750     &--15.1   \\
HD~110432     & 1.31 &   1.29 &   1.29 &72     & 6770  &+5.1     \\
HD~152235     & 1.07 &   1.31 &   1.24 &65     & 16~250 &--4.3    \\
HD~152236     & --    &   1.14 &   --    &10     & 600     &--6.9    \\
HD~152424     & 1.05 &   --    &   --    &10     & 2500  &--7.6    \\
HD~154368     & 1.05 &   1.06 &   1.05 &50     & 9850  &--6.0    \\
HD~157038     & 1.11 &   --    &   --    &10     & 2500  &--14.7   \\
HD~161056     & 1.25 &   1.06 &   1.06 &59     & 11~110 &--11.4    \\
HD~169454     & 1.30 &   1.12 &   1.12 &50     & 22~900 &--10.5   \\
HD~170740     & 1.05 &   1.62 &   1.60 &65     & 7800  &--11.0   \\
HD~205637     & 1.05 &   1.08 &   1.08 &150    & 3385  &  --\\
\hline
\end{tabular}
\end{table}