\begin{table}%t2
  \caption{\label{pileup} Percentage of photon pile-up at different energies.}                                  %\centerline
{\begin{tabular}{l  c  c }         
\hline\hline 
Energy  &
Pile-up (\%) & 
Pile-up (\%)\\
    (keV)         &
 RAWX [29:45] & 
 RAWX [29:36] and RAWX[39:45]\\
\hline
5 &
$1.3 \pm 0.1$  &
$0.2 \pm 0.2$
\\
6 &
$2.0 \pm 0.1$& 
$0.6 \pm 0.2$ \\
7 &
$3.2 \pm 0.2$& 
$1.6 \pm 0.2$ \\
8 &
$5.1 \pm 0.3$& 
$1.9 \pm 0.4$ \\
9 &
$7.4 \pm 0.4$& 
$4.8 \pm 0.5$ \\
10 &
$9.8 \pm 0.6$& 
$6.5 \pm 0.8$ \\
\hline                                            
\end{tabular}}
\par
Note.  The associated errors are reported at 1$\sigma$.
 In the first column we report the energies, in the second  and third
 column
the estimated percentage of photon pile-up, extracting the events from 
the whole source region and excluding the brightest columns 
at  RAWX$~~=37$ and  RAWX$~~=38$,  respectively.      
 \end{table}