\begin{table}%t3
\caption{New Os I lifetimes, wavelengths, branching fractions, and transition probabilities.}
\label{osibf1}
%\centerline
{\begin{tabular}{llrrrrrr}
\hline \hline \noalign{\smallskip}
Upper level   & Lower level & \multicolumn{1}{c}{$\sigma$}    &
\multicolumn{1}{c}{$\lambda_{{\rm air}}$}
     & \multicolumn{1}{c}{$BF_{\rm exp.}$} & \multicolumn{1}{c}{$BF_{\rm th.}$} & 
\multicolumn{1}{c}{$A_{ik}$}
&\multicolumn{1}{c}{Unc.} \\
lifetime           &             & \multicolumn{1}{c}{(cm$^{-1}$)} &
\multicolumn{1}{c}{(\AA)}
     &                    & & \multicolumn{1}{c}{(10$^{6}$~s$^{-1}$)}&
\multicolumn{1}{c}{(\%)} \\
\noalign{\smallskip} \hline \noalign{\smallskip}
5d$^{5}$6s$^{2}$($^{6}$S)6p z $^{7}{\rm P}_{4}$& 5d$^{6}$6s$^{2}$ a$^{5}$D$_{4}$ &
28~331.736 & 3528.602 & 0.287 & 0.306 & 1.08 &11\\
$\tau= 265.0$~ns                    & 5d$^{6}$6s$^{2}$ a$^{5}$D$_{3}$ &
24~172.410 & 4135.781 & 0.515 & 0.651 & 1.94 &9\\
                    & 5d$^{7}$($^{4}$F)6s a$^{5}$F$_{5}$ & 23~187.833 & 4311.393
& 0.195 & 0.025 & 0.73 &11\\
                    & 5d$^{7}$($^{4}$F)6s a$^{5}$F$_{4}$ & 19~187.948 & 5103.497
& 0.002 & 0.016 & 0.01 &13\\
                           & \textit{Residual}                &         &
  & 0.001  &       &  \\
5d$^{6}$6s($^{6}$D)6p z $^{7}{\rm F}_{5}$      & 5d$^{6}$6s$^{2}$ a$^{5}$D$_{4}$ &
30~279.921 & 3301.567 & 0.935 & 0.857 &10.05 &7\\
$\tau= 93.0$ ns                          & 5d$^{7}$($^{4}$F)6s a$^{5}$F$_{5}$ &
25~136.049 & 3977.225 & 0.061 & 0.141 & 0.66 &16\\
                    & 5d$^{7}$($^{4}$F)6s a$^{5}$F$_{4}$ & 21~537.179 & 4641.833
& 0.003 & 0.001 & 0.03 &17\\
                       & \textit{Residual}                    &         &
  & 0.001  &       &  \\
5d$^{6}$6s($^{6}$D)6p z $^{7}{\rm F}_{4}$      & 5d$^{6}$6s$^{2}$ a$^{5}$D$_{4}$ &
32~684.629 & 3058.652 & 0.883  & 0.455 &31.53 &7\\
$\tau= 28.0$ ns                             & 5d$^{6}$6s$^{2}$ a$^{5}$D$_{3}$ &
28~525.263 & 3504.662 & 0.044  & 0.513 & 1.57 &13\\
                                      & 5d$^{7}$($^{4}$F)6s a$^{5}$F$_{5}$ &
27~540.672 & 3629.958 & 0.002 & 0.001 & 0.08 &14\\
                    & 5d$^{7}$($^{4}$F)6s a$^{5}$F$_{4}$ & 23~941.834 & 4175.612
& 0.042  & 0.023 & 1.51 &13\\
                                      & 5d$^{7}$($^{4}$F)6s a$^{3}$F$_{4}$ &
21~654.104 & 4616.769 & 0.017  & 0.001 & 0.60 &14\\
                           & 5d$^{7}$($^{4}$F)6s a$^{5}$F$_{3}$ & 21~306.652 &
4692.056 & 0.007 & 0.002 & 0.25 &14\\
                           & \textit{Residual}                &         &
  & 0.004  &         \\
5d$^{6}$6s($^{6}$D)6p z $^{5}{\rm F}_{5}$      & 5d$^{6}$6s$^{2}$ a$^{5}$D$_{4}$ &
34~365.335 & 2909.057 & 0.978  & 0.926 &40.77 &7\\
$\tau= 28.0$ ns                          & 5d$^{7}$($^{4}$F)6s a$^{5}$F$_{5}$ &
29~221.472 & 3421.160 & 0.003  & 0.066 & 0.14 &17\\
                    & 5d$^{7}$($^{4}$F)6s a$^{5}$F$_{4}$ & 25~622.608 & 3901.698
& 0.007 & 0.006 & 0.28 &17\\
                                      & 5d$^{7}$($^{4}$F)6s a$^{3}$F$_{4}$ &
23~334.750 & 4284.248 & 0.010  & $<$0.001 & 0.40 &17\\
                           & \textit{Residual}                &         &
  & 0.002  &       &  \\
5d$^{6}$6s($^{6}$D)6p z $^{7}{\rm D}_{4}$      & 5d$^{6}$6s$^{2}$ a$^{5}$D$_{4}$ &
22~615.656 & 4420.474 & 0.988 & 0.983&          \\
$^{a}$                         & 5d$^{6}$6s$^{2}$ a$^{5}$D$_{3}$ & 18~456.293 &
5416.700 & 0.001 & 0.001 &          \\
                                   & 5d$^{7}$($^{4}$F)6s a$^{5}$F$_{5}$ &
17~471.770 & 5721.931 & 0.008  &0.012
&        &  \\
                           & \textit{Residual}                &         &
  & 0.004  &          \\
5d$^{6}$6s($^{6}$D)6p z $^{7}{\rm D}_{5}$      & 5d$^{6}$6s$^{2}$ a$^{5}$D$_{4}$ &
23~462.896 & 4260.849 & 0.992  &0.992
& 1.24  &9\\
$\tau= 800(70)$$^{b}$  ns         & \textit{Residual}                   &
&           & 0.008  &          \\
 \hline
 \end{tabular}}
{$^{a}$ No experimental lifetime available.}\\
{$^{b}$ Lifetime measurements by \citet{Kwiatkowski84}}.\\
\end{table}