\begin{table}%t1
  \caption{\label{tableLOGObs}   Time intervals selected in the EPIC-pn lightcurve.}                                    %\centerline
{\begin{tabular}{l c c c}          
\hline\hline 
 &
Time interval&
RGS1&
EPIC-pn\\                       
 &
 s - TSTART[s]&
ks &
ks \\
\hline
INT. 1 &
0--6000 &
6.0  &
2.6
\\
INT. 2 &
6000--19~000& 
13.0& 
5.8 \\
INT. 3 &
$>$19~000& 
3.5& 
1.6 \\
\hline                                            
\end{tabular}}
\smallskip
\par
Note.  The observation was divided into three
time intervals as shown in Fig.~\ref{hardness}. In the first column we report 
the temporal  boundaries of each interval  with respect 
 to the start 
time of the observation. In the second and third column we 
report the exposure times, in kiloseconds, for RGS1, RGS2, and EPIC-pn during 
the three time intervals.        
 \end{table}