\begin{table}%t3
\caption{\label{tab3}Journal of XMM-{\em Newton} observations.}
%\centering
\par
\begin{tabular}{l r l r r r r  }
\hline
\hline
NEP id \# & Date & Instrument & Total  &  Flare-free & Total & Flare-free \\
         &   &  & net counts  & net counts & Exp. time   & Exp. time  \\
         &   &  & (0.5$-$10 keV) & (0.5$-$10 keV) & s   & s \\
\hline
NEP~1239 & 06/27/2004 &  MOS1 & 414.1~$\pm$~29.6 & 105.8~$\pm$~12.3 & 32~602 &   11~755   \\ 
      &  & MOS2 &  485.8~$\pm$~33.6 &  150.4~$\pm$~14.1  & 32~575  &   12~165  \\
  &     &  pn &  1238.0~$\pm$~77.0 & 299.8$~\pm$~18.8  & 24~761   &   5837   \\
NEP~1640 & 03/11/2004 & MOS1 & 416.4~$\pm$~22.2 &  217.3~$\pm$~15.7 & 29~372 & 13~233   \\
     &  and 04/14/2004 & MOS2 & 427.2~$\pm$~23.4 &  243.6~$\pm$~16.1 & 29~385 & 15~093   \\
      &               &   pn & 1339.9~$\pm$~45.4 &  412.4~$\pm$~20.7 & 26~612  & 6022   \\
NEP~2131 &  05/14/2004 & MOS1 & 1063.9~$\pm$~41.5 &  685.0$~\pm$~27.3 &  30~955 & 21~433  \\
          &    & MOS2 &  960.4~$\pm$~39.7 &  661.7~$\pm$~26.7 & 31~061 & 21~533   \\
         &     & pn  &  2387.3~$\pm$~79.5 & 1892.9~$\pm$~45.6 &  24~063  & 16~905 \\
\hline  
\end{tabular}
\end{table}