\begin{table}%tA.1
  \caption{Fit coefficients for ro-vibrational energy levels and 
           Einstein coefficients for polar diatomic molecules.\label{diamol}}
%\centerline
$$
{ \begin{tabular}{llllllll}
  \hline\hline
    & $\omega_{\rm e}$ & $\omega_{\rm e}x_{\rm e}$ & $\omega_{\rm e}y_{\rm e}$ & $B_{\rm e}$ & $a_{\rm e}$ & $D_{\rm e}$ & $b_{\rm e}$ \\
  \hline
    CO & 2169.8028
       & 13.298496
       & 0.0119410
       & 1.9311085
       & 0.0173306
       & 6.0415110($-$6)
       & 4.7428669($-$8)\\
   SiO & 1241.5269
       & 5.9722051
       & 0.0058210
       & 0.7267607
       & 0.0050236
       & 9.8706042($-$7)
       & $-$1.6899730($-$9)\\
    CS & 1285.1403
       & 6.5013679
       & 0.0037048
       & 0.8200434 
       & 0.0059208
       & 1.3313737($-$6)
       & 2.7598168($-$9)\\
  \hline
  \hline
       & \multicolumn{1}{c}{branch} 
       & $a_1$ & $a_2$ & $a_3$ & $a_4$ & $a_5$ & $a_6$ \\
       \hline
  CO   & \multicolumn{1}{c}{(1a)}
       &   35.126
       &  $-$2.5964($-$3)
       &   3.3506($-$4)
       &   9.9885($-$1)
       &  $-$1.3553($-$3)
       &  $-$7.7475($-$6)\\
       & \multicolumn{1}{c}{(1b)}
       &   36.010
       &   4.9628($-$3)
       &   3.2473($-$5)
       &   9.9355($-$1)
       &  $-$6.5762($-$3)
       &  $-$3.8480($-$5)\\
       & \multicolumn{1}{c}{(2a)}
       &   1.3677($-$1)
       &  $-$5.9457($-$4)
       &   3.3151($-$6)
       &   1.5155
       &   5.5514($-$1)
       &   7.5813($-$3)\\
       & \multicolumn{1}{c}{(2b)}
       &   1.4572($-$1)
       &   6.2297($-$4)
       &   5.7196($-$6)
       &   1.4993
       &   5.4100($-$1)
       &   2.8323($-$3)\\
       & \multicolumn{1}{c}{(3a)}
       &   5.0317($-$4)
       &  $-$4.4145($-$6)
       &   2.8274($-$8)
       &   2.7763
       &   2.4531($-$1)
       &   6.2720($-$1)\\
       & \multicolumn{1}{c}{(3b)}
       &   6.4503($-$4)
       &   4.0147($-$6)
       &   1.0813($-$7)
       &   2.3048
       &   6.6627($-$1)
       &   4.0540($-$1)\\
  SiO  & \multicolumn{1}{c}{(1a)}
       &  35.879
       &  1.2589($-$1)
       &  1.5964($-$4)
       &  9.8628($-$1)
       & $-$4.6472($-$3)
       & $-$5.8526($-$4)\\
       & \multicolumn{1}{c}{(1b)}
       &  36.410
       &  $-$1.2753($-$1)
       &   2.3829($-$5)
       &   9.8033($-$1)
       &  $-$9.2596($-$3)
       &  $-$6.5078($-$4)\\
       & \multicolumn{1}{c}{(2a)}
       &   1.8221($-$1)
       &   3.9730($-$5)
       &   1.6372($-$6)
       &   1.4516
       &   6.9366($-$1)
       &  $-$7.0641($-$3)\\
       & \multicolumn{1}{c}{(2b)}
       &   1.8450($-$1)
       &  $-$3.3486($-$5)
       &   1.0777($-$6)
       &   1.4470
       &   6.9103($-$1)
       &  $-$9.0454($-$3)\\
       & \multicolumn{1}{c}{(3a)}
       &   6.9651($-$4)
       &  $-$4.0242($-$7)
       &  $-$2.8118($-$9)
       &   1.2052
       &   4.9774
       &   2.0843($-$2)\\
       & \multicolumn{1}{c}{(3b)}
       &   7.5263($-$4)
       &   1.6333($-$6)
       &  $-$4.704($-$10)
       &   1.3146
       &   4.4637
       &   3.5736($-$2)\\
  CS   & \multicolumn{1}{c}{(1a)}
       &   77.742
       &  $-$1.1589($-$1)
       &   3.4157($-$4)
       &   1.0000
       &   2.9834($-$4)
       &  $-$1.8336($-$4)\\
       & \multicolumn{1}{c}{(1b)}
       &   79.065
       &   1.2039($-$1)
       &   2.3319($-$4)
       &   9.9767($-$1)
       &  $-$2.1245($-$3)
       &  $-$1.7985($-$4)\\
       & \multicolumn{1}{c}{(2a)}
       &   2.4199($-$1)
       &  $-$1.0460($-$3)
       &   3.8244($-$6)
       &   1.5266
       &   5.2586($-$1)
       &   1.2063($-$2)\\
       & \multicolumn{1}{c}{(2b)}
       &   2.5370($-$1)
       &   1.0547($-$3)
       &   7.0820($-$6)
       &   1.5175
       &   5.2067($-$1)
       &   8.2837($-$3)\\
       & \multicolumn{1}{c}{(3a)}
       &   1.0563($-$3)
       &  $-$7.8715($-$6)
       &   2.8565($-$8)
       &   2.2132
       &   6.7195($-$1)
       &   3.1164($-$1)\\
       & \multicolumn{1}{c}{(3b)}
       &   1.1605($-$3)
       &   7.8538($-$6)
       &   8.5469($-$8)
       &   2.0905
       &   7.8194($-$1)
       &   2.6466($-$1)\\
  \hline  
  \end{tabular}}$$
  \end{table}