\begin{table}%t1
\caption{Journal of the observation for the 1998~November~23 \sax\
  observation. $T_{{\rm int}}$ is the net integration time in~ks. The
  net integration time of PDS is shorter by $\sim$50\% due to the
  high deadtime of the instrument. The net integration time of the
  LECS is $\sim$50\% shorter as well due to the fact that it observes
  only during night time. The beginning and the end of the observation
  is in MJD.}\label{tab:obs_times} 
%\centering
\par
\begin{tabular}{lcccr}
\hline
\hline 
Detector   & c/s & Start & Stop &  $T_{{\rm int}}$ \\
\hline
LECS & 0.197 $\pm$ 0.005 & 51140.710 &  51140.853 & 12.4\\
MECS & 0.404 $\pm$ 0.004 & 51140.685 &  51140.828 & 33.4\\
PDS & 0.451 $\pm$ 0.006 &  51140.686 &  51140.829 & 14.6\\
\hline
\end{tabular}
\end{table}