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Table 1
Summary of molecular lines observed in line-of-sight absorption.
| Molecule | Transition | Frequency | EL | θB | Catalog |
| (MHz) | (K) | ||||
|
|
|||||
| OH |   F = 1+–2− |
1612.2310(2) | 0.0026 | 7.8′ | JPL |
| OH | F = 1+–1− |
1665.4018(2) | 0.000 | 7.6′ | JPL |
| OH | F = 2+–2− |
1667.3590(2) | 0.0026 | 7.6′ | JPL |
| c-C3H2 | 110–101 | 18 343.143(2) | 2.35 | 41.2′′ | CDMS |
| c-C3H2 | 220–211 | 21 587.4008(3) | 8.67 | 35.0′′ | JPL |
| c-C3H2 | 211–202 | 46 755.610(2) | 6.43 | 16.2′′ | CDMS |
| c-H13CCCH | 110–101 | 18 413.8248(7) | 2.29 | 41.1′′ | CDMS |
| H2CO | 110–111 | 4829.660(1) | 15.16 | 2.6′ | JPL |
| H2CO | 211–212 | 14 488.479(1) | 21.92 | 52.2′′ | JPL |
| H2CO | 312–313 | 28 974.805(10) | 32.060 | 26.1′′ | JPL |
H CO |
110–111 | 4593.0885(1) | 15.126 | 2.7′′ | JPL |
| HCO |
211–212 | 13 778.8041(2) | 21.723 | 54.9′′ | JPL |
| 28SiO | 1–0 | 43 423.76(5) | 0.000 | 17.4′′ | CDMS |
| 29SiO | 1–0 | 42 879.949(3) | 0.000 | 17.6′′ | CDMS |
| 30SiO | 1–0 | 42 373.427(5) | 0.000 | 17.8′′ | CDMS |
| SO | 10–01 | 30 001.58(10) | 0.000 | 25.2′′ | CDMS |
| CS | 1–0 | 48 990.955(2) | 0.000 | 15.4′′ | CDMS |
| C34S | 1–0 | 48 206.941(2) | 0.000 | 15.7′′ | CDMS |
| CCS | NJ = 12–21 | 22 344.031(1) | 0.533 | 33.8′′ | CDMS |
| CCS | NJ = 23–12 | 33 751.370(1) | 1.606 | 22.4′′ | CDMS |
| HCS+ | 1–0 | 42 674.195(1) | 0.000 | 17.7′′ | CDMS |
| H2CS | 101–000 | 34 351.43(2) | 0.000 | 22.0′′ | CDMS |
| l-C3H |   F = 2–1 f |
32 627.297(2) | 0.00086 | 23.2′′ | CDMS |
| l-C3H | F = 2–1 e |
32 660.645(2) | 0.00086 | 23.1′′ | CDMS |
| l-C3H+ | 1–0 | 22 489.864(2) | 0.00 | 33.6′′ | CDMS |
| l-C3H+ | 2–1 | 44 979.544(3) | 1.079 | 16.8′′ | CDMS |
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