\begin{table}%T1
\par
\caption{\label{table1}Target levels  of Fe X and their threshold energies (in Ryd).}
%\centerline
{
{
\begin{tabular}{rllrrrrr} 
\hline
\hline
Index    & Configuration               & Level                   &  NIST       &  BD	  &   GRASP4  &   DGM      &   GRASP8\\
\hline
  1......& 3s$^2$3p$^5$                &   $^2$P$^\circ_{3/2}$       &    0.0000   &  0.0000   &  0.0000  &    0.0000   &  0.0000  \\
  2......& 3s$^2$3p$^5$     	       &   $^2$P$^\circ_{1/2}$       &    0.1429   &  0.1322   &  0.1430  &    0.1426   &  0.1426  \\
  3......& 3s3p$^6$         	       &   $^2$S$_{1/2}$         &    2.6358   &  2.6329   &  2.6221  &    2.5927   &  2.6024  \\
  4......& 3s$^2$3p$^4$ ($^3$P)3d      &   $^4$D$_{5/2}$         &    3.5422   &  3.5564   &  3.5453  &    3.5448   &  3.5473  \\
  5......& 3s$^2$3p$^4$ ($^3$P)3d      &   $^4$D$_{7/2}$         &    3.5422   &  3.5569   &  3.5442  &    3.5446   &  3.5468  \\
  6......& 3s$^2$3p$^4$ ($^3$P)3d      &   $^4$D$_{3/2}$         &    3.5544   &  3.5661   &  3.5571  &    3.5545   &  3.5587  \\
  7......& 3s$^2$3p$^4$ ($^3$P)3d      &   $^4$D$_{1/2}$         &    3.5681   &  3.5784   &  3.5712  &    3.5682   &  3.5724  \\
  8......& 3s$^2$3p$^4$ ($^3$P)3d      &   $^4$F$_{9/2}$         &    3.8059   &  3.8263   &  3.8191  &    3.8077   &  3.8407  \\
  9......& 3s$^2$3p$^4$ ($^1$D)3d      &   $^2$P$_{1/2}$         &    ......   &  3.8904   &  3.8882  &    3.7636   &  3.8608  \\
 10......& 3s$^2$3p$^4$ ($^3$P)3d      &   $^4$F$_{7/2}$         &    3.8528   &  3.8693   &  3.8672  &    3.8549   &  3.8876  \\
 11......& 3s$^2$3p$^4$ ($^3$P)3d      &   $^4$F$_{5/2}$         &    3.8890   &  3.9005   &  3.9019  &    3.8925   &  3.9220  \\
 12......& 3s$^2$3p$^4$ ($^3$P)3d      &   $^4$F$_{3/2}$         &    3.9029   &  3.9150   &  3.9178  &    3.9373   &  3.9345  \\
 13......& 3s$^2$3p$^4$ ($^1$D)3d      &   $^2$P$_{3/2}$         &    3.9360   &  3.9585   &  3.9606  &    3.8949   &  3.9375  \\
 14......& 3s$^2$3p$^4$ ($^1$D)3d      &   $^2$D$_{3/2}$         &    3.9605   &  4.0056   &  4.0073  &    3.9710   &  3.9942  \\
 15......& 3s$^2$3p$^4$ ($^3$P)3d      &   $^4$P$_{1/2}$         &    3.9622   &  3.9978   &  4.0003  &    3.9833   &  3.9992  \\
 16......& 3s$^2$3p$^4$ ($^3$P)3d      &   $^4$P$_{3/2}$         &    ......   &  4.0450   &  4.0497  &    4.1171   &  4.0435  \\
 17......& 3s$^2$3p$^4$ ($^3$P)3d      &   $^4$P$_{5/2}$         &    4.0265   &  4.0652   &  4.0683  &    4.0303   &  4.0615  \\
 18......& 3s$^2$3p$^4$ ($^3$P)3d      &   $^2$F$_{7/2}$         &    4.0172   &  4.1517   &  4.0671  &    4.0274   &  4.0716  \\
 19......& 3s$^2$3p$^4$ ($^1$D)3d      &   $^2$D$_{5/2}$         &    ......   &  4.0871   &  4.0939  &    4.0532   &  4.0836  \\
 20......& 3s$^2$3p$^4$ ($^1$D)3d      &   $^2$G$_{9/2}$         &    4.1075   &  4.1440   &  4.1501  &    4.1116   &  4.1612  \\
 21......& 3s$^2$3p$^4$ ($^1$D)3d      &   $^2$G$_{7/2}$         &    4.1106   &  4.0649   &  4.1603  &    4.1249   &  4.1660  \\
 22......& 3s$^2$3p$^4$ ($^3$P)3d      &   $^2$F$_{5/2}$         &    4.1256   &  4.1866   &  4.1966  &    4.1513   &  4.1935  \\
 23......& 3s$^2$3p$^4$ ($^1$D)3d      &   $^2$F$_{5/2}$         &    ......   &  4.4638   &  4.4796  &    4.5386   &  4.4664  \\
 24......& 3s$^2$3p$^4$ ($^1$D)3d      &   $^2$F$_{7/2}$         &    4.4286   &  4.4981   &  4.5147  &    4.5689   &  4.5020  \\
 25......& 3s$^2$3p$^4$ ($^1$S)3d      &   $^2$D$_{3/2}$         &    4.6639   &  4.7849   &  4.8102  &    4.7120   &  4.7243  \\
 26......& 3s$^2$3p$^4$ ($^1$S)3d      &   $^2$D$_{5/2}$         &    ......   &  4.8234   &  4.8497  &    4.9266   &  4.7618  \\
 27......& 3s$^2$3p$^4$ ($^1$D)3d      &   $^2$S$_{1/2}$         &    4.9380   &  5.2766   &  5.3189  &    4.9886   &  5.0228  \\
 28......& 3s$^2$3p$^4$ ($^3$P)3d      &   $^2$P$_{3/2}$         &    5.1414   &  5.3219   &  5.3605  &    5.2806   &  5.2727  \\
 29......& 3s$^2$3p$^4$ ($^3$P)3d      &   $^2$P$_{1/2}$         &    5.1941   &  5.3762   &  5.4141  &    5.3628   &  5.3243  \\
 30......& 3s$^2$3p$^4$ ($^3$P)3d      &   $^2$D$_{5/2}$         &    5.2211   &  5.4723   &  5.5127  &    5.3950   &  5.3428  \\
 31......& 3s$^2$3p$^4$ ($^3$P)3d      &   $^2$D$_{3/2}$         &    5.3422   &  5.5857   &  5.6339  &    5.5132   &  5.4633  \\
 32......& 3s3p$^5$($^3$P)3d	       &   $^4$P$^\circ_{1/2}$       &    ......   &  6.4777   &  6.4698  &    6.1094   &  6.2252  \\
 33......& 3s3p$^5$($^3$P)3d	       &   $^4$P$^\circ_{3/2}$       &    ......   &  6.5033   &  6.4953  &    6.1323   &  6.2485  \\
 34......& 3s3p$^5$($^3$P)3d	       &   $^4$P$^\circ_{5/2}$       &    ......   &  6.5485   &  6.5411  &    6.1760   &  6.2905  \\
 35......& 3s3p$^5$($^3$P)3d	       &   $^4$F$^\circ_{9/2}$       &    6.3484   &  6.6584   &  6.6513  &    6.3568   &  6.5516  \\
 36......& 3s3p$^5$($^3$P)3d	       &   $^4$F$^\circ_{7/2}$       &    6.3742   &  6.6857   &  6.6817  &    6.3834   &  6.5771  \\
 37......& 3s3p$^5$($^3$P)3d	       &   $^4$F$^\circ_{5/2}$       &    6.4024   &  6.7131   &  6.7121  &    6.4115   &  6.6044  \\
 38......& 3s3p$^5$($^3$P)3d	       &   $^4$F$^\circ_{3/2}$       &    6.4283   &  6.7369   &  6.7385  &    6.4366   &  6.6293  \\
 39......& 3s3p$^5$($^3$P)3d	       &   $^4$D$^\circ_{7/2}$       &    ......   &  6.9896   &  6.9929  &    6.7351   &  6.8504  \\
 40......& 3s3p$^5$($^3$P)3d	       &   $^4$D$^\circ_{1/2}$       &    ......   &  7.0050   &  7.0142  &    6.7480   &  6.8630  \\
 41......& 3s3p$^5$($^3$P)3d	       &   $^4$D$^\circ_{5/2}$       &    ......   &  7.0058   &  7.0116  &    6.7482   &  6.8662  \\
 42......& 3s3p$^5$($^3$P)3d	       &   $^4$D$^\circ_{3/2}$       &    ......   &  7.0080   &  7.0160  &    6.7507   &  6.8678  \\
 43......& 3s3p$^5$($^3$P)3d	       &   $^2$F$^\circ_{7/2}$       &    ......   &  7.2283   &  7.2411  &    6.8396   &  6.9268  \\
 44......& 3s3p$^5$($^3$P)3d	       &   $^2$F$^\circ_{5/2}$       &    ......   &  7.2554   &  7.3246  &    6.8890   &  6.9859  \\
 45......& 3s3p$^5$($^3$P)3d	       &   $^2$D$^\circ_{3/2}$       &    ......   &  7.2845   &  7.2975  &    6.9375   &  7.0510  \\
 46......& 3s3p$^5$($^3$P)3d	       &   $^2$D$^\circ_{5/2}$       &    ......   &  7.3078   &  7.2679  &    6.9562   &  7.0664  \\
 47......& 3s3p$^5$($^1$P)3d	       &   $^2$P$^\circ_{1/2}$       &    ......   &  7.5371   &  7.5536  &    7.0603   &  7.1458  \\
 48......& 3s3p$^5$($^1$P)3d	       &   $^2$P$^\circ_{3/2}$       &    ......   &  7.6084   &  7.6294  &    7.1273   &  7.2206  \\
 49......& 3s3p$^5$($^1$P)3d           &   $^2$F$^\circ_{5/2}$       &    ......   &  7.9368   &  7.9637  &    7.3210   &  7.4237  \\
 50......& 3s3p$^5$($^1$P)3d	       &   $^2$F$^\circ_{7/2}$       &    ......   &  7.9483   &  7.9728  &    7.3556   &  7.4626  \\
 51......& 3s3p$^5$($^1$P)3d	       &   $^2$D$^\circ_{3/2}$       &    ......   &  8.1956   &  8.2299  &    7.5919   &  7.6777  \\
 52......& 3s3p$^5$($^1$P)3d	       &   $^2$D$^\circ_{5/2}$       &    ......   &  8.2031   &  8.2350  &    7.6056   &  7.6931  \\
 53......& 3s3p$^5$($^3$P)3d	       &   $^2$P$^\circ_{1/2}$       &    ......   &  8.8872   &  8.9439  &    7.9995   &  8.2058  \\
 54......& 3s3p$^5$($^3$P)3d	       &   $^2$P$^\circ_{3/2}$       &    ......   &  8.8768   &  8.9304  &    8.0054   &  8.2119  \\
\hline
\end{tabular}}}
\par
\medskip
NIST  ({\tt http://www.physics.nist/gov/PhysRefData}),
BD: Bhatia \& Doschek (\cite{Bhatia95}), 
DGM: Deb et~al. (\cite{Deb02}), 
GRASP4: present results from 4  configurations and  54 levels, 
GRASP8: present results from 8  configurations and  669 levels. 
\end{table}