\begin{table}%t2
\caption{Emission lines observed by \xmm~EPIC-PN and \chandra\ with their identification, fluxes, and equivalent widths.}\label{tab2}
%\centering
\small
\begin{tabular}{ccccccc}
\hline \hline
%& & & & & & & & \\[-8pt]
\multicolumn{1}{c}{Theoretical} & \multicolumn{3}{c}{\xmm} & \multicolumn{3}{c}{\chandra}\\
\multicolumn{1}{c}{value} & \multicolumn{1}{c}{Energy} & \multicolumn{1}{c}{Flux} &
 \multicolumn{1}{c}{{\it EW}} & \multicolumn{1}{c}{Energy} & \multicolumn{1}{c}{Flux} &
 \multicolumn{1}{c}{{\it EW}} \\
  keV &keV &[10$^{-4}$~ph/cm$^2$/s] & eV & keV & [10$^{-4}$~ph/cm$^2$/s] &eV\\
%& & & & & & & & \\[-8pt]
\hline  
%& & & & & & & & \\[-8pt]
$0.739$ (O VII RRC)&$0.739$&$\rm 0.381^{+0.237}_{-0.248}$&28.0\\
$0.826$ (Fe XVII L)&$0.826$&$\rm 0.416^{+0.132}_{-0.141}$&36.4\\
$0.899$ (O VIII RRC)&$0.899$&$\rm 0.855^{+0.142}_{-0.152}$&85.3\\ 
$1.022$ (Ne X K$\alpha$)&$1.022$&$\rm 0.249^{+0.096}_{-0.010}$&26.9\\       
$1.053$ (Fe XXII L)&$1.053$&$\rm 0.110^{+0.083}_{-0.091}$&11.0\\
$1.170$ (Fe XXIV L)&$1.170$&$\rm 0.124^{+0.032}_{-0.062}$&17.0 &\\      
$1.211$ (Ne X K$\beta$)&$1.211$&$\rm 0.075^{+0.044}_{-0.051}$&10.3            &$\rm 1.210^{+0.005}_{-0.002}$&$\rm 0.067^{+0.108}_{-0.053}$&17.7\\
$\rm 1.331$ (Mg XI K$\alpha$ (f)) &$1.331$&$\rm 0.075^{+0.044}_{-0.051}$&44.0                   &$\rm 1.332^{+0.001}_{-0.002}$&$\rm 0.101^{+0.097}_{-0.067}$&25.2\\
$1.343$ (Mg XI K$\alpha$ (i))&              &           &&$\rm 1.341^{+0.001}_{-0.001}$&$\rm 0.056^{+0.064}_{-0.037}$&14.5\\
$1.352$ (Mg XIK$\alpha$ (r)) &              &           &&$\rm 1.352^{+0.001}_{-0.001}$&$\rm 0.072^{+0.070}_{-0.044}$&19.6\\
$1.472$ (Mg XII K$\alpha$)&              &           &&$\rm 1.472^{+0.001}_{-0.001}$&$\rm 0.081^{+0.051}_{-0.047}$&44.2\\
$1.578$ (Mg XI K$\beta$)  &              &           &&$\rm 1.579^{+0.001}_{-0.001}$&$\rm 0.034^{+0.023}_{-0.016}$&23.8\\
$\rm 1.740+1.745+1.746$ (Si II + Mg XII + Si VI)&$1.740$&$\rm 0.117^{+0.028}_{-0.029}$&32.6 &$\rm 1.740^{+0.005}_{-0.001}$&$\rm 0.055^{+0.021}_{-0.023}$&48.4\\
$1.839$ (Si XIII K$\alpha$ (f))&             &           &&$\rm 1.839^{+0.001}_{-0.001}$&$\rm 0.080^{+0.030}_{-0.026}$&49.2\\
$1.840$ (Mg XII)          &$1.840$&$\rm 0.183^{+0.051}_{-0.038}$&49.7&$\rm 1.845^{+0.004}_{-0.002}$&$\rm 0.049^{+0.028}_{-0.035}$&27.6\\
$1.865$ (Si XIII K$\alpha$ (r))&$1.865$&$\rm 0.082^{+0.046}_{-0.051}$&20.5                   &$\rm 1.864^{+0.001}_{-0.001}$&$\rm 0.077^{+0.029}_{-0.029}$&53.0\\
$2.007$ (Si XIV K$\alpha$)&$2.007$&$\rm 0.101^{+0.025}_{-0.024}$&35.6                   &$\rm 2.005^{+0.001}_{-0.001}$&$\rm 0.095^{+0.030}_{-0.032}$&162\\
$2.308$ (Si II)           &          &               &&$\rm 2.307^{+0.008}_{-0.000}$&$\rm 0.067^{+0.040}_{-0.040}$&105\\
$2.377+2.387$ (Si XIV K$\beta$ + S XII)&$2.377$&$\rm 0.191^{+0.028}_{-0.029}$&71.4      &$\rm 2.394^{+0.006}_{-0.024}$&$\rm 0.066^{+0.053}_{-0.053}$&51.4\\
$2.430$ (S XV)            &          &               &&$\rm 2.441^{+0.003}_{-0.016}$&$\rm 0.086^{+0.043}_{-0.043}$&95.5\\
$2.461$ (Si XV)           &$2.461$&$\rm 0.119^{+0.028}_{-0.026}$&42.3                   &$\rm 2.462^{+0.003}_{-0.006}$&$\rm 0.085^{+0.041}_{-0.040}$&95.6\\    
$2.623$ (Si XVI)          &$2.623$&$\rm 0.069^{+0.024}_{-0.023}$&30.9&\\
$2.962$ (Ar II)           &$2.962$&$\rm 0.024^{+0.020}_{-0.019}$&11.3                   &$\rm 2.960^{+0.011}_{-0.005}$&$\rm 0.050^{+0.033}_{-0.030}$&49.4\\
$3.104$ (Ar XVII)         &          &               &&$\rm 3.110^{+0.010}_{-0.011}$&$\rm 0.022^{+0.022}_{-0.022}$&21.2\\
$3.710$ (Ca II)           &$3.710$&$\rm 0.054^{+0.020}_{-0.019}$&50.0                   &$\rm 3.690^{+0.004}_{-0.000}$&$\rm 0.038^{+0.019}_{-0.018}$&35.8\\
$6.310$ Compton shoulder correction  &$6.297$        &&                         &&                         \\
$6.391+6.405$ (Fe K$\alpha)$ &$\rm 6.409^{+0.001}_{-0.001}$                &$\rm 6.400^{+0.0003}_{-0.0004}$&1310&$\rm 6.409^{+0.001}_{-0.001}$&$\rm 2.567^{+0.131}_{-0.161}$&1040\\
$6.637$ (Fe XXV)            &$\rm 6.610^{+0.044}_{-0.020}$&$\rm 0.147^{+0.029}_{-0.027}$&172 & \\
$6.700$ (Fe XXV)            &$\rm 6.658^{+0.039}_{-0.048}$&$\rm 0.108^{+0.025}_{-0.026}$&251                 &$\rm 6.659^{+0.030}_{-0.030}$&$\rm 0.100^{+0.062}_{-0.062}$&\\
$7.057+7.058$ (Fe K$\beta)$ &$7.057$&$\rm 0.332^{+0.028}_{-0.029}$&302                 &$\rm 7.054^{+0.002}_{-0.010}$&$\rm 0.332^{+0.096}_{-0.096}$&230\\
$7.461$ (Ni K$\alpha)$      &$7.461$&$\rm 0.110^{+0.020}_{-0.022}$&169& \\                     
\hline
\end{tabular}
\end{table}