\begin{table}%t5
\caption{\label{tab:CH3C-13-N} Lower state quantum numbers of rotational transitions 
of CH$_3^{13}$CN from present work, frequencies (MHz), uncertainties unc. (kHz), and 
residuals o$-$c (kHz) between observed frequencies and those calculated from 
the final set of spectroscopic parameters.}
\par
%\centerline

\small\begin{tabular}{crcrr | crcrr |  crcrr}
\hline \hline
$J''$ & \multicolumn{1}{c}{$K''$} & Frequency & \multicolumn{1}{c}{unc.} & o$-$c & 
$J''$ & \multicolumn{1}{c}{$K''$} & Frequency & \multicolumn{1}{c}{unc.} & o$-$c &
$J''$ & \multicolumn{1}{c}{$K''$} & Frequency & \multicolumn{1}{c}{unc.} & o$-$c \\
\hline
 16 &  6 &  ~312317.7600 & 1.0 &   0.1 & 34 &  1 &  642938.809  &  50 & $-$45 & 53 &  3 &  ~990423.344  &  50 & $-$29 \\
 16 &  3 &  ~312479.1625 & 1.0 &   0.2 & 34 &  0 &  642950.994  &  50 & $-$54 & 53 &  2 &  ~990515.635  &  20 &  $-$1 \\
 16 &  2 &  ~312509.0842 & 1.0 &   0.1 & 41 &  6 &  770673.135  &  50 & $-$47 & 53 &  1 &  ~990571.014  &  20 &     6 \\
 16 &  1 &  ~312527.0409 & 1.0 &$-$1.1 & 41 &  4 &  770963.549  &  50 & $-$25 & 53 &  0 &  ~990589.492  &  20 &    24 \\
 16 &  0 &  ~312533.0294 & 1.0 &   0.6 & 41 &  3 &  771065.296  &  50 &  $-$8 & 54 &  6 & 1008167.091  &  30 &    44 \\
 23 & 10 &  440278.491  &  50 & $-$21 & 41 &  2 &  771137.916  &  50 & $-$81 & 54 &  4 & 1008542.013  &  30 &    25 \\
 23 &  9 &  440437.626  &  20 &    20 & 41 &  1 &  771181.580  &  50 & $-$45 & 54 &  2 & 1008767.251  &  50 &    58 \\
 23 &  8 &  440580.110  &  20 & $-$13 & 41 &  0 &  771196.159  &  50 & $-$11 & 54 &  1 & 1008823.503  &  30 & $-$19 \\
 23 &  7 &  440706.004  &  20 &  $-$5 & 42 & 10 &  788019.367  & 150 &$-$162 & 54 &  0 & 1008842.357  &  50 &    57 \\
 23 &  6 &  440815.253  &  20 &    40 & 42 &  9 &  788300.498  &  50 &    10 & 55 &  9 & 1025547.406  &  30 &    34 \\
 23 &  5 &  440907.717  &  20 &    25 & 42 &  8 &  788552.113  &  50 & $-$61 & 55 &  8 & 1025870.459  &  50 &  $-$6 \\
 23 &  4 &  440983.429  &  30 &    22 & 42 &  7 &  788774.377  &  50 &$-$108 & 55 &  7 & 1026155.838  &  50 & $-$13 \\
 23 &  1 &  441109.693  &  20 &  $-$8 & 42 &  6 &  788967.211  &  50 &$-$125 & 55 &  6 & 1026403.441  &  50 &    25 \\ 
 23 &  0 &  441118.148  &  20 &    23 & 42 &  5 &  789130.563  &  50 & $-$86 & 55 &  4 & 1026784.724  &  30 &    22 \\
 24 & 12 &  458222.531  & 120 &    20 & 42 &  4 &  789264.223  &  80 &$-$135 & 55 &  3 & 1026918.341  &  50 &    68 \\
 24 & 11 &  458422.402  & 120 & $-$48 & 42 &  3 &  789368.387  &  50 & $-$24 & 55 &  2 & 1027013.731  &  20 &    11 \\
 24 & 10 &  458605.156  & 120 &$-$114 & 42 &  2 &  789442.628  &  80 &$-$135 & 55 &  1 & 1027071.016  &  20 &    14 \\
 24 &  7 &  459050.448  &  50 &   118 & 42 &  1 &  789487.346  &  50 & $-$40 & 55 &  0 & 1027090.097  &  20 &  $-$2 \\
 24 &  6 &  459164.066  &  50 &    45 & 42 &  0 &  789502.201  &  50 & $-$62 & 56 & 12 & 1042550.491  &  50 &    34 \\
 24 &  5 &  459260.263  &  50 & $-$36 & 43 & 12 &  805624.829  &  80 &$-$124 & 56 & 11 & 1042993.029  &  50 & $-$55 \\
 24 &  4 &  459339.106  &  50 & $-$18 & 43 & 10 &  806288.633  &  50 & $-$59 & 56 & 10 & 1043397.819  &  30 &    14 \\
 24 &  3 &  459400.506  &  50 &    40 & 43 &  9 &  806575.857  &  50 & $-$47 & 56 &  9 & 1043764.461  &  30 &  $-$1 \\
 24 &  2 &  459444.289  &  50 & $-$10 & 43 &  8 &  806833.106  &  50 & $-$84 & 56 &  8 & 1044092.961  &  20 &    46 \\
 24 &  1 &  459470.550  &  50 & $-$57 & 43 &  7 &  807060.397  &  50 & $-$53 & 56 &  7 & 1044383.048  &  30 &    15 \\
 24 &  0 &  459479.378  &  50 &     1 & 43 &  6 &  807257.542  &  50 & $-$50 & 56 &  4 & 1045022.335  &  30 &    24 \\
 25 & 12 &  476531.946  &  80 & $-$16 & 43 &  5 &  807424.442  & 100 & $-$97 & 56 &  2 & 1045255.204  &  30 &    79 \\
 25 & 10 &  476929.757  &  80 & $-$44 & 43 &  4 &  807561.186  &  50 & $-$37 & 56 &  1 & 1045313.390  &  20 &    32 \\
 25 &  9 &  477101.989  &  50 &    35 & 43 &  3 &  807667.545  &  50 & $-$46 & 56 &  0 & 1045332.804  &  20 &    33 \\
 25 &  8 &  477256.174  &  50 &     1 & 43 &  2 &  807743.522  &  50 & $-$77 & 60 & 13 & 1114776.860  &  50 & $-$32 \\
 25 &  7 &  477392.405  &  50 &    11 & 43 &  1 &  807789.195  &  50 & $-$20 & 60 & 12 & 1115288.291  &  20 &  $-$4 \\
 25 &  6 &  477510.574  &  50 &    11 & 43 &  0 &  807804.377  &  50 & $-$46 & 60 & 10 & 1116190.390  &  20 &  $-$1 \\
 25 &  5 &  477610.680  &  50 &    46 & 44 &  7 &  825342.348  & 100 & $-$89 & 60 &  9 & 1116580.728  &  20 & $-$11 \\
 25 &  4 &  477692.603  &  50 &    39 & 44 &  6 &  825543.773  &  50 & $-$85 & 60 &  8 & 1116930.416  &  20 &     6 \\
 25 &  3 &  477756.356  &  50 &    33 & 44 &  5 &  825714.366  & 100 & $-$62 & 60 &  7 & 1117239.270  &  20 &  $-$0 \\
 25 &  2 &  477801.869  &  50 & $-$14 & 44 &  4 &  825853.985  &  50 & $-$94 & 60 &  6 & 1117507.196  &  20 &  $-$2 \\
 25 &  1 &  477829.257  &  50 &    30 & 44 &  2 &  826040.390  &  50 & $-$22 & 60 &  5 & 1117734.082  &  50 &  $-$4 \\
 25 &  0 &  477838.379  &  50 &    37 & 44 &  1 &  826086.880  &  50 &$-$138 & 60 &  4 & 1117919.833  &  20 & $-$13 \\
 26 & 12 &  494839.226  &  50 &   102 & 45 & 12 &  842122.594  & 150 & $-$45 & 60 &  2 & 1118167.698  &  20 &  $-$0 \\
 26 & 11 &  495054.907  & 100 &   104 & 45 & 10 &  842814.997  & 120 &$-$150 & 60 &  1 & 1118229.675  &  20 & $-$17 \\
 26 & 10 &  495252.014  &  50 &  $-$0 & 45 &  9 &  843114.715  &  80 & $-$93 & 60 &  0 & 1118250.348  &  20 & $-$12 \\
 26 &  9 &  495430.686  &  50 &     4 & 47 & 13 &  878195.374  & 150 &    79 & 61 &  9 & 1134771.355  &  50 &    23 \\
 26 &  8 &  495590.783  &  50 &    47 & 47 & 12 &  878604.078  &  80 &  $-$4 & 61 &  8 & 1135126.272  &  20 &    17 \\
 26 &  7 &  495732.066  &  50 & $-$44 & 47 & 11 &  878980.835  &  80 &    76 & 61 &  7 & 1135439.732  &  30 & $-$20 \\
 26 &  6 &  495854.766  &  50 &    16 & 47 & 10 &  879325.220  &  50 &    39 & 61 &  6 & 1135711.703  &  20 &  $-$1 \\
 26 &  4 &  496043.684  &  50 &    47 & 47 &  9 &  879637.230  &  50 &    18 & 61 &  5 & 1135941.998  &  20 &  $-$1 \\
 26 &  3 &  496109.798  &  50 &  $-$9 & 47 &  8 &  879916.758  &  50 &    27 & 61 &  2 & 1136382.127  &  20 &     6 \\
 26 &  2 &  496157.109  &  50 &    18 & 47 &  7 &  880163.650  &  50 &    22 & 61 &  1 & 1136445.038  &  30 &  $-$8 \\
 26 &  1 &  496185.478  &  50 &     8 & 47 &  6 &  880377.805  &  50 &     0 & 61 &  0 & 1136466.018  &  20 &  $-$6 \\
 26 &  0 &  496194.930  &  50 &     0 & 47 &  5 &  880559.094  & 100 & $-$84 & 62 & 15 & 1149921.646  &  50 &     6 \\
 27 & 12 &  513143.945  &  80 &    36 & 47 &  4 &  880707.708  &  50 &    35 & 62 & 14 & 1150530.560  &  50 &    37 \\
 27 & 10 &  513571.914  & 100 &    91 & 47 &  3 &  880823.252  & 100 &    21 & 62 & 12 & 1151625.207  &  50 &    36 \\
 27 &  9 &  513757.039  &  50 &    47 & 47 &  2 &  880905.815  &  50 &    10 & 62 & 11 & 1152110.498  &  30 & $-$25 \\
 27 &  8 &  513922.895  &  50 &    26 & 47 &  1 &  880955.373  &  50 &    10 & 62 & 10 & 1152554.304  &  30 &  $-$3 \\
 27 &  7 &  514069.366  &  50 & $-$21 & 47 &  0 &  880971.914  &  50 &    29 & 62 &  8 & 1153316.508  &  20 &     3 \\
 27 &  6 &  514196.520  &  50 &    29 & 48 & 13 &  896421.629  & 120 &  $-$9 & 62 &  7 & 1153634.632  &  25 &    10 \\
 27 &  5 &  514304.162  &  50 &    36 & 48 & 12 &  896838.549  &  80 &    59 & 62 &  6 & 1153910.575  &  20 &  $-$3 \\
 \hline  
 27 &  4 &  514392.277  &  50 &    27 & 48 & 10 &  897573.823  &  80 &    10 & 62 &  5 & 1154144.275  &  20 &     9 \\
 27 &  3 &  514460.821  &  50 &  $-$8 & 48 &  9 &  897892.002  &  50 &     2 & 62 &  4 & 1154335.590  &  20 &  $-$2 \\
 27 &  2 &  514509.842  &  50 &     9 & 48 &  8 &  898177.045  &  50 &    13 & 62 &  2 & 1154590.861  &  20 & $-$11 \\
 27 &  1 &  514539.243  &  50 &  $-$0 & 48 &  7 &  898428.827  &  50 &    27 & 62 &  1 & 1154654.718  &  20 &  $-$5 \\
 27 &  0 &  514549.047  &  50 &  $-$1 & 48 &  6 &  898647.220  &  50 &    19 & 62 &  0 & 1154676.018  &  20 &     8 \\
 33 & 15 &  621969.166  &  30 &    40 & 48 &  4 &  898983.584  &  50 &     9 & 63 & 12 & 1169785.281  &  20 &  $-$4 \\
 33 & 14 &  622308.158  &  30 & $-$16 & 48 &  2 &  899185.623  &  50 &     8 & 63 & 11 & 1170277.655  &  30 &     0 \\
 33 & 13 &  622624.402  &  20 & $-$16 & 48 &  1 &  899236.139  &  50 & $-$12 & 63 & 10 & 1170727.840  &  30 & $-$15 \\
 33 & 10 &  623435.148  &  30 & $-$11 & 48 &  0 &  899253.011  &  50 &    13 & 63 &  9 & 1171135.718  &  40 &     5 \\
 33 &  9 &  623659.045  &  20 & $-$13 & 49 & 13 &  914643.473  & 200 &$-$207 & 63 &  7 & 1171823.773  &  20 & $-$14 \\
 33 &  8 &  623859.664  &  20 &    34 & 49 & 10 &  915818.023  & 150 & $-$47 & 63 &  6 & 1172103.723  &  20 &  $-$9 \\
 33 &  7 &  624036.764  &  20 & $-$31 & 49 &  9 &  916142.366  &  50 & $-$25 & 63 &  5 & 1172340.795  &  25 &  $-$2 \\
 33 &  6 &  624190.451  &  20 & $-$31 & 49 &  8 &  916432.928  &  50 &     8 & 63 &  4 & 1172534.868  &  40 & $-$21 \\
 33 &  5 &  624320.650  &  20 &    21 & 49 &  7 &  916689.536  &  50 &  $-$4 & 63 &  2 & 1172793.840  &  25 & $-$19 \\
 33 &  4 &  624427.221  &  30 &    36 & 49 &  6 &  916912.168  &  50 &    16 & 63 &  1 & 1172858.675  &  40 &    42 \\
 33 &  3 &  624510.071  &  30 & $-$36 & 49 &  4 &  917255.016  &  50 &     5 & 63 &  0 & 1172880.216  &  20 & $-$11 \\
 33 &  2 &  624569.356  &  20 &  $-$5 & 49 &  2 &  917460.920  &  50 & $-$26 & 64 & 12 & 1187939.602  & 120 &$-$128 \\
 33 &  0 &  624616.735  &  30 & $-$42 & 49 &  1 &  917512.445  &  50 & $-$10 & 64 & 11 & 1188438.974  & 150 &$-$112 \\
 34 & 15 &  640227.661  &  40 &     8 & 49 &  0 &  917529.610  &  50 & $-$17 & 64 & 10 & 1188895.674  &  30 &  $-$1 \\
 34 & 14 &  640576.289  &  60 &$-$112 & 53 & 13 &  987487.235  & 200 &   170 & 64 &  9 & 1189309.325  &  20 &     4 \\
 34 & 13 &  640901.691  &  30 &  $-$2 & 53 & 11 &  988364.813  &  80 &   104 & 64 &  8 & 1189679.851  &  25 & $-$11 \\
 34 & 11 &  641481.367  &  50 & $-$52 & 53 & 10 &  988749.584  &  50 &    37 & 64 &  7 & 1190007.145  &  30 & $-$12 \\
 34 &  8 &  642172.196  &  30 & $-$45 & 53 &  9 &  989098.196  &  20 &     3 & 64 &  6 & 1190291.073  &  20 &  $-$1 \\
 34 &  7 &  642354.446  &  30 & $-$28 & 53 &  8 &  989410.512  &  20 &     1 & 64 &  5 & 1190531.497  &  20 &  $-$5 \\
 34 &  4 &  642756.021  &  20 & $-$12 & 53 &  7 &  989686.393  &  20 &    15 & 64 &  4 & 1190728.334  &  30 & $-$13 \\
 34 &  3 &  642841.300  &  20 & $-$26 & 53 &  6 &  989925.693  &  20 &     7 & 64 &  2 & 1190990.978  &  20 & $-$13 \\
 34 &  2 &  642902.247  &  30 & $-$28 & 53 &  4 &  990294.279  &  20 &    22 & 64 &  1 & 1191056.621  &  50 & $-$63 \\
 \hline  
 \end{tabular} \end{table}