\begin{table}%t3
%\centering
\par
\caption{\label{TSCR} Source extraction and low background screening process: 
   (1) an annulus with an inner radius of~$1'$ and an outer
   radius~$5'$ centered on the source position was used as reference area for the screening. The data were binned with    10~s;  
   (2)  coordinates in J2000; 
   (3)  extraction radius for the source; 
   (4)  energy range considered for the screening;
   (5)  rejection threshold for screening;
   (6)  for annular background areas the inner and the outer radius are provided.
   (7)  background corrected count rate in the energy range of 0.3--12.0~keV for pn and
        0.5--10.0~keV for MOS, respectively;
   (8)  accumulated exposure time.}
\begin{tabular}{rccclcrcccc}
\hline \hline  
\multicolumn{1}{l}{Exp.} & \multicolumn{3}{l}{Source extraction} & \multicolumn{2}{l}{Screening$^{(1)}$ } & 
\multicolumn{3}{l}{Background extraction} & \multicolumn{2}{l}{Net source} \\
\multicolumn{1}{l}{Nr.}& RA$^{(2)}$ &  Dec$^{(2)}$  & $r^{(3)}$ &  Energy$^{(4)}$  & CR$^{(5)}$  &   
RA$^{(2)}$ &  Dec$^{(2)}$  & $r^{(6)}$  & CR$^{(7)}$  & $T^{(8)}$  \\  
     &     [h:m:s] &  [d:m:s]      & [$'$] & [keV] & [s$^{-1}$]   & [h:m:s] &  [d:m:s] & [$'$] & [$10^{-2} ~\rm s^{-1}$] & [$s$]   \\
\hline 
1 & 10:04:20.29 & $+$05:12:59.6 & 0.30 & 0.3--12.0  & 2.0  &    10:04:14.47 & $+$05:13:22.1 & 0.6 & 3.57~$\pm$~0.21 & 8815 \\  
2 & 10:04:20.33 & $+$05:12:58.6 & 0.30 & 0.5--10.0  & 0.5  &    Source      & Source    & 1.0--2.0 & 0.71~$\pm$~0.08 & 10~966\\
3 & 10:04:20.29 & $+$05:12:59.6 & 0.30 & 0.5--10.0  & 0.5  &    Source      & Source    & 1.0--2.0 & 0.53~$\pm$~0.07 & 11~009 \\
\par
6 & 21:14:52.45 & $+$06:07:41.6 & 0.30 & 0.3--12.0  & 10.  &    21:14:57.25 & $+$06:08:06.6 & 0.6 & 11.1~$\pm$~0.34 & 10~507 \\
7 & 21:14:52.42 & $+$06:07:40.7 & 0.30 & 0.5--10.0  & 2.0  &    Source      & Source    & 1.0--2.5 & 3.25~$\pm$~0.16  & 13~287 \\
8 & 21:14:52.58 & $+$06:07:40.7 & 0.30 & 0.5--10.0  & 2.0  &    Source      & Source    & 1.0--2.5 & 2.99~$\pm$~0.15 & 13~248 \\  
\par
10 & 15:36:38.43 & $+$54:33:32.3 & 0.35 & 0.3--12.0  & 7.0 &   15:36:36.14 & $+$54:32:27.3 & 0.6 & 14.2~$\pm$~0.29  & 20~031 \\
11 & 15:36:38.37 & $+$54:33:31.8 & 0.30 & 0.5--10.0  & 3.0 &   Source      & Source    & 0.8--1.4 & 4.01~$\pm$~0.13  & 26~523 \\
12 & 15:36:38.31 & $+$54:33:32.9 & 0.30 & 0.5--10.0  & 3.0 &   Source      & Source    & 0.8--1.4 & 4.03~$\pm$~0.13  & 26~516 
\\  \hline 
\end{tabular}
\end{table}