\begin{table} %t1
\caption{\label{tab1}Target levels  of Ar~XVII and their threshold energies (in~Ryd).}
%\centerline
{
\begin{tabular}{rllrrrr} 
\hline
\hline
Index    & Configuration & Level           &   Expt.$^a$  &  CHIANTI$^b$  & GRASP$^c$    & GRASP$^d$    \\ 
\hline
   1  &    1s$^2$  &	   $^1$S$_ 0$	   &	0.00000   &	0.000000  &	0.00000  &     0.00000  \\ 
   2  &    1s2s    &	   $^3$S$_ 1$	   &  228.15015   &   228.225601  &   228.20039  &   227.97345  \\ 
   3  &    1s2p    &	   $^3$P$_ 0$$^{\circ}$  &  229.52797   &   229.586395  &   229.55811  &   229.37311  \\ 
   4  &    1s2p    &	   $^3$P$_ 1$$^{\circ}$  &  229.57456   &   229.683594  &   229.64185  &   229.41945  \\ 
   5  &    1s2s    &	   $^1$S$_ 0$	   &  229.64803   &   229.813187  &   229.79482  &   229.59423  \\ 
   6  &    1s2p    &	   $^3$P$_ 2$$^{\circ}$  &  229.77757   &   229.942795  &   229.85488  &   229.61924  \\ 
   7  &    1s2p    &	   $^1$P$_ 1$$^{\circ}$  &  230.75280   &   231.076797  &   230.91628  &   230.67177  \\ 
   8  &    1s3s    &	   $^3$S$_ 1$	   &  270.03877   &   270.118805  &   270.10078  &   269.86520  \\ 
   9  &    1s3p    &	   $^3$P$_ 0$$^{\circ}$  &  270.41842   &   270.507599  &   270.48924  &   270.26436  \\ 
  10  &    1s3p    &	   $^3$P$_ 1$$^{\circ}$  &  270.43266   &   270.539978  &   270.51412  &   270.27814  \\ 
  11  &    1s3s    &	   $^1$S$_ 0$	   &  270.43505   &   270.539978  &   270.56681  &   270.33115  \\ 
  12  &    1s3p    &	   $^3$P$_ 2$$^{\circ}$  &  270.49291   &   270.604797  &   270.57739  &   270.33735  \\ 
  13  &    1s3d    &	   $^3$D$_ 1$	   &  270.70342   &   270.831604  &   270.76091  &   270.52312  \\ 
  14  &    1s3d    &	   $^3$D$_ 2$	   &  270.70332   &   270.831604  &   270.76537  &   270.52336  \\ 
  15  &    1s3d    &	   $^3$D$_ 3$	   &  270.72730   &   270.864014  &   270.78817  &   270.54629  \\ 
  16  &    1s3d    &	   $^1$D$_ 2$	   &  270.73840   &   270.896393  &   270.79950  &   270.55973  \\ 
  17  &    1s3p    &	   $^1$P$_ 1$$^{\circ}$  &  270.75700   &   270.896393  &   270.90193  &   270.65251  \\ 
  18  &    1s4s    &	   $^3$S$_ 1$	   &  284.49700   &   284.569214  &   284.51374  &   284.33206  \\ 
  19  &    1s4p    &	   $^3$P$_ 0$$^{\circ}$  &  284.65550   &   284.731201  &   284.66948  &   284.51012  \\ 
  20  &    1s4p    &	   $^3$P$_ 1$$^{\circ}$  &  284.66200   &   284.731201  &   284.67979  &   284.51602  \\
  21  &    1s4s    &	   $^1$S$_ 0$	   &  284.66300   &   284.731201  &   284.70448  &   284.54750  \\
  22  &    1s4p    &	   $^3$P$_ 2$$^{\circ}$  &  284.68700   &   284.763611  &   284.76417  &   284.54187  \\
  23  &    1s4f    &	   $^3$F$_ 2$$^{\circ}$  &              &   284.893188  &   284.78987  &   284.59841  \\
  24  &    1s4f    &	   $^3$F$_ 3$$^{\circ}$  &              &   284.893188  &   284.79216  &   284.59761  \\
  25  &    1s4f    &	   $^3$F$_ 4$$^{\circ}$  &              &   284.893188  &   284.79899  &   284.60335  \\
  26  &    1s4f    &	   $^1$F$_ 3$$^{\circ}$  &		  &   284.893188  &   284.80109  &   284.60404  \\
  27  &    1s4d    &	   $^3$D$_ 1$	   &  284.77650	  &   284.860771  &   284.80115  &   284.61206  \\
  28  &    1s4d    &	   $^3$D$_ 2$	   &  284.77600	  &   284.860771  &   284.80523  &   284.61259  \\
  29  &    1s4d    &	   $^3$D$_ 3$	   &  284.78659	  &   284.893188  &   284.80532  &   284.62291  \\
  30  &    1s4d    &	   $^1$D$_ 2$	   &  284.79100   &   284.893188  &   284.80839  &   284.63107  \\
  31  &    1s4p    &	   $^1$P$_ 1$$^{\circ}$  &  284.79900   &   284.893188  &   284.89237  &   284.69334  \\
  32  &    1s5s    &	   $^3$S$_ 1$	   &  291.14600   &   291.211212  &   291.25271  &   290.94261  \\
  33  &    1s5p    &	   $^3$P$_ 0$$^{\circ}$  &  291.22781   &   291.276001  &   291.30708  &   291.02186  \\
  34  &    1s5p    &	   $^3$P$_ 1$$^{\circ}$  &  291.23100   &   291.308411  &   291.32863  &   291.02504  \\
  35  &    1s5s    &	   $^1$S$_ 0$	   &  291.23200   &   291.308411  &   291.32863  &   291.02873  \\
  36  &    1s5p    &	   $^3$P$_ 2$$^{\circ}$  &  291.24393   &   291.308411  &   291.33041  &   291.03802  \\
  37  &    1s5d    &	   $^3$D$_ 1$	   &		  &   291.373199  &   291.33041  &   291.08109  \\
  38  &    1s5d    &	   $^3$D$_ 2$	   &              &   291.373199  &   291.35444  &   291.08138  \\
  39  &    1s5d    &	   $^3$D$_ 3$	   &              &   291.373199  &   291.35978  &   291.08625  \\
  40  &    1s5f    &	   $^3$F$_ 2$$^{\circ}$  &		  &   291.373199  &   291.37420  &   291.08943  \\
  41  &    1s5f    &	   $^3$F$_ 3$$^{\circ}$  &		  &   291.373199  &   291.37423  &   291.08909  \\
  42  &    1s5d    &	   $^1$D$_ 2$	   &  291.29700   &   291.373199  &   291.37860  &   291.08971  \\
  43  &    1s5f    &	   $^3$F$_ 4$$^{\circ}$  &		  &   291.373199  &   291.37947  &   291.09206  \\
  44  &    1s5f    &	   $^1$F$_ 3$$^{\circ}$  &		  &   291.373199  &   291.37950  &   291.09237  \\
  45  &    1s5g    &	   $^3$G$_ 3$	   &		  &   291.373199  &   291.40201  &   291.09235  \\
  46  &    1s5g    &	   $^3$G$_ 4$	   &		  &   291.373199  &   291.40291  &   291.09214  \\
  47  &    1s5g    &	   $^3$G$_ 5$	   &              &   291.373199  &   291.40919  &   291.09395  \\
  48  &    1s5g    &	   $^1$G$_ 4$	   &		  &   291.373199  &   291.41330  &   291.09409  \\
  49  &    1s5p    &	   $^1$P$_ 1$$^{\circ}$  &  291.30100   &   291.373199  &   291.41497  &   291.09523  \\
\hline						\end{tabular}}
\smallskip
$^a$ NIST  ({\tt http://physics.nist/gov/PhysRefData}).\\
$^b$ Energy levels of Sampson et~al. (1983) from {\sc chianti} database ({\tt http://wwwsolar.nrl.navy.mil/chianti.html}). \\
$^c$ Present results from GRASP {\em without} Breit and QED effects. \\
$^d$ Present results from GRASP {\em with} Breit and QED effects.  
\end{table}