Table 1:

Line intensities and identifications in each spectrum. Rows beginning with a ``+'' indicate that the line is blended with that on the row above. The quantum numbers given in the ``transition'' column are J except where stated. H2O transitions are given in the format $J^\prime $ $_{k_a^\prime }$ $_{k_c^{\prime }}$-Jkakc.
        AFGL 2688 AFGL 618 NGC 7027
$\bar{\nu}_0$(cm-1) $\lambda_0$ ($\mu$m) Species Transition $\bar{\nu}_{\rm obs}$ (cm-1) F($\times$10-18 Wm-2) $\bar{\nu}_{\rm obs}$ (cm-1) F($\times$10-18 Wm-2) $\bar{\nu}_{\rm obs}$ (cm-1) F($\times$10-18 Wm-2)
15.119 661.40 HNC 5-4     15.111 $205.8 \pm 6.3$    
15.239 656.23 12CO $\nu = 1$;4-3 15.248 $63.0 \pm 8.1$        
15.379 650.25 12CO 4-3 15.372 $281.4 \pm 8.7$ 15.369 $217.8 \pm 12.9$ 15.371 $556.5 \pm 6.0$
15.707 636.65 p-H2O 642-551     15.705 $20.1 \pm 18.3$    
16.294 613.71 p-H2O 624-717     16.275 $56.4 \pm 13.8$ 16.282 $129.9 \pm 21.9$
16.417 609.14 [C  I] 1-0         16.397 $97.2 \pm 21.6$
17.278 578.78 H13CN 6-5 17.273 $256.8 \pm 2.7$ 17.293 $127.5 \pm 9.0$ 17.259 $126.3 \pm 28.5$
17.428 573.80 HN13C 6-5 17.411 $91.5 \pm 8.7$     17.420 $60.0 \pm 13.8$
17.478 572.16 CCH N =6-5     17.472 $165.3 \pm 11.7$    
17.736 563.82 HCN 6-5 17.733 $325.8 \pm 6.6$ 17.742 $185.7 \pm 4.2$ 17.748 $31.8 \pm 11.4$
17.848 560.30 HCO+ 6-5     17.864 $126.3 \pm 3.6$    
18.377 544.16 13CO 5-4 18.375 $243.6 \pm 7.8$ 18.364 $59.7 \pm 9.0$ 18.377 $100.5 \pm 3.9$
18.577 538.29 o-H2O 110-101 18.571 $164.4 \pm 3.9$ 18.583 $68.1 \pm 4.5$ 18.574 $154.5 \pm 14.7$
19.222 520.23 12CO 5-4 19.222 $568.2 \pm 4.2$ 19.223 $358.2 \pm 1.5$ 19.219 $882.9 \pm 4.8$
20.390 490.45 CCH N =7-6 20.384 $39.6 \pm 2.4$ 20.390 $40.8 \pm 5.1$ 20.374 $42.3 \pm 4.8$
20.691 483.30 HCN 7-6 20.687 $456.9\pm 3.3$ 20.687 $279.9 \pm 6.6$ 20.674 $43.5 \pm 2.7$
20.793 480.93 HCN $\nu_2 = 1$; 7-6f 20.787 111.6 $\pm$ 3.3 2*20.818 2*150.6 $\pm$ 6.9    
20.821 480.28 HCO+ 7-6         20.818 157.8 $\pm$ 3.3
20.878 478.96 HCl 1-0 20.859 100.5 $\pm$ 3.3        
21.165 472.48 HNC 7-6     21.176 89.4 $\pm$ 4.5    
21.949 455.61 p-H2O $\nu_2 = 1$; 110-101 21.946 70.5 $\pm$ 7.8        
22.051 453.50 13CO 6-5 22.044 249.3 $\pm$ 5.1 22.054 85.5 $\pm$ 3.0 22.044 136.8 $\pm$ 4.8
22.483 444.79 CN N=6-5;$\nu$=1 22.489 11.7 $\pm$ 2.7        
22.683 440.86 CN N =6-5;$\nu$=0 22.681 73.5 $\pm$ 5.7        
22.855 437.54 12CO $\nu = 1$; 6-5 22.849 50.1 $\pm$ 3.3 22.872 45.6 $\pm$ 38.1    
23.065 433.56 12CO 6-5 23.060 1002.0 $\pm$ 3.6 23.064 547.8 $\pm$ 4.8 23.058 1144.0 $\pm$ 5.1
23.303 429.13 CCH N =8-7 23.309 58.5 $\pm$ 3.9 23.309 76.2 $\pm$ 10.5 23.306 33.9 $\pm$ 3.6
23.646 422.91 HCN 8-7 23.643 693.9 $\pm$ 4.5 23.643 293.4 $\pm$ 5.1 23.636 40.8 $\pm$ 3.6
23.762 420.84 HCN $\nu_2 = 1$; 8-7f 23.761 101.4 $\pm$ 3.6 2*23.789 2*118.2 $\pm$ 6.0    
23.795 420.26 HCO+ 8-7         23.795 40.8 $\pm$ 4.2
24.187 413.45 HNC 8-7 24.195 30.6 $\pm$ 9.3 24.191 110.7 $\pm$ 1.8    
25.085 398.64 o-H2O 211-202     25.113 228.3 $\pm$ 4.5    
25.492 392.28 I H20$\alpha$     25.507 50.1 $\pm$ 3.9 25.493 6.6 $\pm$ 3.3
25.724 388.74 13CO 7-6 25.720 380.1 $\pm$ 7.5 25.719 121.8 $\pm$ 3.0 25.720 81.6 $\pm$ 4.5
25.912 385.92 H13CN 9-8 25.914 235.2 $\pm$ 6.9 25.915 51.0 $\pm$ 1.5    
26.171 382.10 CN N=7-6; $\nu = 1$         26.167 28.5 $\pm$ 4.2
26.226 381.30 CCH N =9-8 26.225 148.2 $\pm$ 6.9 26.233 147.0 $\pm$ 3.0 26.230 42.9 $\pm$ 5.1
26.470 377.78 CN N=7-6; $\nu = 0$ 26.468 56.4 $\pm$ 20.1        
26.600 375.95 HCN 9-8 26.596 855.0 $\pm$ 9.6 26.599 406.2 $\pm$ 6.3    
26.731 374.10 HCN $\nu_2 = 1$; 9-8f 26.732 98.4 $\pm$ 8.7 2*26.756 2*166.2 $\pm$ 6.6    
26.767 373.59 HCO+ 9-8            
26.907 371.65 12CO 7-6 26.905 1465.0 $\pm$ 9.3 26.907 825.9 $\pm$ 6.3 26.900 1768.0 $\pm$ 13.8
26.997 370.41 [C  I] 2-1         26.997 113.4 $\pm$ 11.1
27.208 367.54 HNC 9-8     27.211 113.7 $\pm$ 2.1    
27.855 359.00 CH+ 1-0     27.847 65.1 $\pm$ 3.0 27.851 466.5 $\pm$ 4.5
28.685 348.61 o-H2O $\nu_2 = 1$; 211-202 28.677 60.9 $\pm$ 2.1 28.672 32.7 $\pm$ 8.4    
28.789 347.36 H13CN 10-9 28.781 207.3 $\pm$ 2.7 28.775 33.9 $\pm$ 7.2    
29.121 343.39 CCH N=10-9 29.129 146.1 $\pm$ 7.8 29.139 91.8 $\pm$ 8.7 29.119 57.6 $\pm$ 10.2
29.396 340.18 13CO 8-7 29.391 543.9 $\pm$ 5.4 29.389 202.8 $\pm$ 8.7 29.386 136.8 $\pm$ 12.6
29.553 338.38 HCN 10-9 29.550 916.8 $\pm$ 5.7 29.556 524.1 $\pm$ 9.3    
29.622 337.59 I H19$\alpha$         29.614 10.2 $\pm$ 6.0
29.698 336.72 HCN $\nu_2 = 1$; 10-9f 29.695 172.8 $\pm$ 6.9 2*29.715 2*189.6 $\pm$ 8.1    
29.739 336.26 HCO+ 10-9         29.735 7.8 $\pm$ 5.7
29.970 333.67 CN N=8-7;$\nu = 1$ 29.974 117.3 $\pm$ 13.2        
30.228 330.82 p-H2O 928-835 30.244 167.7 $\pm$ 13.5        
+30.229 330.81 HNC 10-9            
+30.241 330.68 CN N =8-7; $\nu = 0$            
30.468 328.21 12CO $\nu = 1$; 8-7     30.472 21.6 $\pm$ 8.4    
30.560 327.22 p-H2O 422-331     30.573 26.4 $\pm$ 8.7    
30.748 325.23 12CO 8-7 30.748 2073.0 $\pm$ 16.5 30.748 1229.0 $\pm$ 10.2 30.740 2249.0 $\pm$ 11.7
31.665 315.80 H13CN 11-10 31.653 297.3 $\pm$ 24.0 31.651 129.3 $\pm$ 19.5    
32.030 312.21 CCH N=11-10     32.023 69.9 $\pm$ 8.1    
32.366 308.96 p-H2O 524-431     32.368 81.0 $\pm$ 3.6    
32.505 307.64 HCN 11-10 32.501 818.7 $\pm$ 6.3 32.501 554.1 $\pm$ 3.6    
32.665 306.13 HCN $\nu_2 = 1$; 11-10f 32.665 150.3 $\pm$ 7.8 2*32.703 2*129.3 $\pm$ 10.5    
32.711 305.71 HCO+ 11-10         32.702 38.7 $\pm$ 2.7
32.954 303.46 p-H2O 202-111 32.946 236.4 $\pm$ 7.2 32.952 340.2 $\pm$ 3.6 32.943 44.1 $\pm$ 3.3
33.067 302.41 13CO 9-8 33.066 457.2 $\pm$ 7.5 33.066 202.5 $\pm$ 3.9 33.060 87.0 $\pm$ 3.3
33.249 300.76 HNC 11-10     33.244 142.2 $\pm$ 3.6    
33.711 296.64 CN N=9-8; $\nu = 1$     33.708 33.6$\pm$ 32.4    
34.026 293.90 CN N=9-8; $\nu = 0$ 34.030 124.8$\pm$ 13.8 34.039 230.7 $\pm$ 14.4    
34.588 289.12 12CO 9-8 34.585 2711.0 $\pm$ 17.4 34.586 1586.0 $\pm$ 10.2 34.579 2114.0 $\pm$ 12.0
34.695 288.23 I H18$\alpha$         34.691 28.2 $\pm$ 8.7
34.940 286.20 CCH N =12-11     34.945 75.9 $\pm$ 6.0    
35.457 282.03 HCN 12-11 35.456 907.8 $\pm$ 8.7 35.457 521.7 $\pm$ 4.2    
35.632 280.65 HCN $\nu_2 = 1$; 12-11f 35.639 237.6 $\pm$ 14.4 2*35.663 2*153.6 $\pm$ 4.8    
35.681 280.26 HCO+ 12-11         35.669 31.8 $\pm$ 5.4
36.268 275.73 HNC 12-11     36.266 144.0 $\pm$ 6.9    
36.604 273.19 o-H2O 312-303 36.586 157.8 $\pm$ 15.6 36.601 276.0 $\pm$ 7.5    
36.737 272.20 13CO 10-9 36.736 479.4 $\pm$ 18.0 36.737 166.8 $\pm$ 3.0 6.730 77.4 $\pm$ 4.2
37.137 269.27 p-H2O 111-000 37.140 183.3 $\pm$ 6.9 37.138 257.1 $\pm$ 4.2 37.119 42.9 $\pm$ 11.7
37.416 267.27 H13CN 13-12 37.425 258.9 $\pm$ 9.6 37.423 110.4 $\pm$ 6.6    
37.451 267.01 CN N=10-9; $\nu = 1$         37.448 21.6 $\pm$ 10.2
37.800 264.55 CN N =10-9; $\nu = 0$     37.799 171.6 $\pm$ 3.3    
37.845 264.24 CCH N =13-12         37.842 35.4 $\pm$ 11.1
38.076 262.63 12CO $\nu$=1;10-9 38.083 67.5 $\pm$ 72.3        
38.247 261.46 o-H2O 725-818 38.235 16.5 $\pm$ 15.3        
38.408 260.36 HCN 13-12 38.421 4116.0 $\pm$ 23.4 38.424 2732.0 $\pm$ 20.1 38.416 2275.0 $\pm$ 10.8
+38.426 260.24 12CO 10-9            
38.597 259.09 HCN $\nu_2 = 1$; 13-12f 38.597 140.4 $\pm$ 24.9        
38.638 258.82 o-H2O 634-541     38.638 131.1 $\pm$ 19.2    
+38.651 258.73 HCO+ 13-12            
38.791 257.79 o-H2O 321-312     38.793 223.2 $\pm$ 6.3    
38.972 256.59 o-H2O 854-761 38.969 250.2 $\pm$ 6.9 38.966 205.2 $\pm$ 6.9    
39.286 254.55 HNC 13-12 39.293 75.0 $\pm$ 5.7 39.279 139.5 $\pm$ 5.1    
40.282 248.25 p-H2O 422-413 40.280 285.0 $\pm$ 3.9 40.278 113.1 $\pm$ 4.2    
+40.290 248.20 H13CN 14-13            
40.406 247.49 13CO 11-10 40.401 479.7 $\pm$ 4.2 40.402 185.7 $\pm$ 4.5 40.392 54.9 $\pm$ 4.2
40.517 246.81 p-H2O $\nu_2 = 1$; 312-303         40.510 5.7 $\pm$ 3.9
40.530 246.73 p-H2O $\nu_2 = 1$; 845-752 40.525 356.1 $\pm$ 3.6 40.524 220.2 $\pm$ 3.9    
40.750 245.40 CCH N=14-13     40.752 64.5 $\pm$ 4.2    
40.988 243.97 p-H2O 220-211     40.992 102.0 $\pm$ 3.9 40.981 31.5 $\pm$ 4.5
+40.996 243.93 I H17$\alpha$            
41.191 242.77 CN N=11-10; $\nu = 1$     41.201 21.3 $\pm$ 3.0    
41.358 241.79 HCN 14-13 41.356 876.0 $\pm$ 11.1 41.357 600.9 $\pm$ 3.9 41.358 16.5 $\pm$ 3.6
41.561 240.61 HCN $\nu_2 = 1$; 14-13f 41.545 166.2 $\pm$ 11.4        
42.263 236.61 12CO 11-10 42.263 3765.0 $\pm$ 24.0 42.265 2615.0 $\pm$ 13.2 42.253 2365.0 $\pm$ 12.6
43.162 231.68 H13CN 15-14 43.156 114.6 $\pm$ 9.0        
43.655 229.07 CCH N=15-14         43.649 29.7 $\pm$ 3.0
44.073 226.90 13CO 12-11 44.072 512.7 $\pm$ 10.5 44.078 262.8 $\pm$ 3.3 44.062 64.5 $\pm$ 3.0
44.308 225.69 HCN 15-14 44.303 852.3 $\pm$ 10.2 44.306 570.3 $\pm$ 5.4    
44.525 224.59 HCN $\nu_2 = 1$; 15-14f 44.523 133.5 $\pm$ 22.8        
44.919 222.62 CN N =12-11;$\nu$=1 44.903 20.1 $\pm$ 9.3        
45.318 220.66 HNC 15-14 45.324 65.4 $\pm$ 7.5 45.323 160.5 $\pm$ 3.9    
46.098 216.93 12CO 12-11 46.096 4356.0 $\pm$ 15.3 46.097 3009.0 $\pm$ 100.5 46.087 2370.0 $\pm$ 9.3
46.428 215.39 HN13C 16-15 46.443 32.7 $\pm$ 16.2 46.439 20.4 $\pm$ 6.9    
46.922 213.12 p-H2O $\nu_2 = 1$; 321-312     46.918 7.5 $\pm$ 4.8    
47.053 212.53 o-H2O 523-514     47.049 43.8 $\pm$ 6.6    
47.256 211.61 HCN 16-15 47.255 837.9 $\pm$ 9.9 47.255 570.0 $\pm$ 7.5    
47.487 210.58 HCN $\nu_2 = 1$;16-15f     47.469 73.8 $\pm$ 12.6    
47.555 210.28 HCO+ 16-15     47.555 73.2 $\pm$ 11.7 47.565 28.2 $\pm$ 5.4
47.738 209.48 13CO 13-12 47.737 488.1 $\pm$ 16.2 47.740 217.2 $\pm$ 1.8 47.726 80.4 $\pm$ 6.3
48.333 206.90 HNC 16-15     48.329 91.8 $\pm$ 1.5 48.337 20.7 $\pm$ 6.3
48.655 205.53 CN N =13-12;$\nu$=1     48.658 118.5 $\pm$ 3.6    
48.738 205.18 [N  II] 2-1         48.725 73.5 $\pm$ 7.8
48.921 204.41 I H16$\alpha$ 48.924 212.4 $\pm$ 22.5 48.922 177.6 $\pm$ 3.3 48.918 102.3 $\pm$ 7.2
49.117 203.60 CN N =13-12; $\nu = 0$     49.121 219.9 $\pm$ 4.5    
49.932 200.27 12CO 13-12 49.932 4329.0 $\pm$ 27.3 49.933 3387.0 $\pm$ 15.3 49.921 2252.0 $\pm$ 9.6
50.203 199.19 HCN 17-16 50.204 709.2 $\pm$ 22.5 50.205 552.3 $\pm$ 6.6    
50.521 197.94 HCO+ 17-16     50.515 117.6 $\pm$ 14.1    
51.402 194.55 13CO 14-13 51.393 444.9 $\pm$ 22.5 51.381 298.5 $\pm$ 8.4    


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