\begin{table}%t4
\caption{Improved wavelengths, branching fractions and transition propabilities for Ir~II. \label{irbf}}
%\centerline
{
\begin{tabular}{llrrlrr}
\hline \hline 
Upper level& Lower level& \multicolumn{1}{c}{$\sigma$}    & \multicolumn{1}{c}{$\lambda^{a}$} &\multicolumn{1}{c}{$BF^{b}$} &\multicolumn{1}{c}{$A_{ik}$}		& \multicolumn{1}{c}{Unc.} 	\\
	   &            & \multicolumn{1}{c}{(cm$^{-1}$)} & \multicolumn{1}{c}{(\AA)}			 &                
&\multicolumn{1}{c}{(10$^{6}$ s$^{-1}$)}	& \multicolumn{1}{c}{(\%)}	\\
\hline 
\parent{4}{F}6p \ls{5}{D}{4}	& \parent{4}{F}6s \ls{5}{F}{5} 	& 44~575.566 & 2242.6832			& 0.839~$_{{\rm SA}}$ &155.386 & 5 		\\
 				& \parent{4}{F}6s \ls{5}{F}{4} 	& 39~787.709 & 2512.5797			& 0.124 & 22.899 & 10		\\
				&				&	    & \textit{Residual}		& 0.037 &        & 		\\
\parent{4}{F}6p \ls{5}{F}{5}	& \parent{4}{F}6s \ls{5}{F}{5}	& 47~003.928 & 2126.8076			& 0.688~$_{{\rm SA}}$	&156.426 & 6		\\
              			& \parent{4}{F}6s \ls{5}{F}{4}	& 42~216.061 & 2368.0408                 & 0.260 & 59.008 & 9		\\
      				&				&           & \textit{Residual}         & 0.052 &        & 		\\
\parent{5}{D}6sp \ls{7}{D}{4}	& \parent{4}{F}6s \ls{5}{F}{5}	& 50~302.042 & 1987.3429			& 0.637~$_{{\rm SA}}$ & 18.745 & 6		\\ 
 	    			& \parent{4}{F}6s \ls{5}{F}{4}	& 45~513.675 & 2196.4534                 & 0.300 &  8.821 & 8		\\ 
				&				&           & \textit{Residual}         & 0.063 &        & 		\\ 
\parent{4}{F}6p \ls{5}{D}{3}	& \parent{4}{F}6s \ls{5}{F}{4} 	& 46~438.501 & 2152.7062			& 0.872 &181.722 & 5		\\
				&			       	&	    & \textit{Residual}		& 0.128 &        & 		\\
\parent{5}{D}6sp \ls{7}{D}{5}	& \parent{4}{F}6s \ls{5}{F}{5}	& 51~332.743 & 1947.4329			& 0.845~$_{{\rm SA}}$ & 16.246 & 5 		\\ 
                		& \parent{4}{F}6s \ls{5}{F}{4}  & 39~613.037 & 2523.6596                 & 0.103 &  1.983 & 10		\\ 
				&                               &           & \textit{Residual}         & 0.052 &        & 		\\ 
\parent{4}{F}6p \ls{5}{F}{2}	& \parent{4}{F}6s \ls{5}{F}{2}	& 42~396.962 & 2357.9359   		& 0.146 & 22.140 & 8		\\          
                        	& \parent{4}{P}6s \ls{5}{P}{3}	& 38~657.247 & 2586.0605                 & 0.469 & 71.084 & 6		\\
                        	& \parent{4}{F}6s \ls{5}{F}{3}	& 43~185.012 & 2314.9041                 & 0.250 & 37.923 & 7		\\
				&				&           & \textit{Residual}         & 0.134 &        & 		\\
\parent{4}{F}6p \ls{5}{F}{1}	& 5d$^{8}$ 	  \ls{3}{P}{1}	& 42~916.192 & 2329.4106			& 0.306 & 57.818 & 8		\\ 
          			& \parent{4}{F}6s \ls{5}{F}{2}	& 43~003.306 & 2324.6863              	& 0.520 & 98.069 & 7		\\
				&				&           & \textit{Residual}	        & 0.174 &        & 		\\
\parent{4}{F}6p \ls{3}{D}{2}	& 5d$^{8}$        \ls{3}{P}{2} 	& 49~419.801 & 2022.8305 		& 0.144 & 22.542 & 7 		\\
                                & \parent{4}{F}6s \ls{5}{F}{3} 	& 44~324.138 & 2255.4060 		& 0.126 & 19.691 & 7 		\\
                                & 5d$^{8}$        \ls{3}{P}{1} 	& 43~447.750 & 2300.9042 		& 0.172 & 26.806 & 7 		\\
                                & \parent{4}{F}6s \ls{5}{F}{1} 	& 40~552.314 & 2465.2023 		& 0.223 & 34.857 & 7 		\\
                                & \parent{4}{P}6s \ls{5}{P}{2} 	& 36~833.808 & 2714.0898 		& 0.063 &  9.801 & 10		\\
                                & \parent{2}{D}6s \ls{3}{D}{3} 	& 26~118.858 & 3827.5694 		& 0.076 & 11.820 & 9 		\\
                                &                              	&           & \textit{Residual}   	& 0.197 &        & 		\\
\parent{4}{F}6p \ls{5}{G}{3}	& \parent{4}{F}6s \ls{5}{F}{3}	& 45~009.332 & 2221.0678			& 0.186 & 23.302 & 7		\\ 
                		& \parent{4}{F}6s \ls{5}{F}{2}	& 41~888.101 & 2386.5826                 & 0.256 & 32.026 & 7		\\ 
                		& \parent{4}{P}6s \ls{5}{P}{3}	& 40~481.538 & 2469.5127                 & 0.420 & 52.533 & 6		\\ 
				&				&           & \textit{Residual}         & 0.137 &        & 		\\ 
\hline
\end{tabular}}
\medskip
$^{a}$ Wavelengths above 2000~\AA\ are listed as air wavelengths and below as vacuum wavelengths.   \\
$^{b}$ SA: The transition intensity has been corrected for self-absorption.        
\end{table}