\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}