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Table A.13
Observed line fluxes 
(K km s-1) for HCOOH and its isotopic species.
| Frequency | Transition | Eup | A | Sources | ||
| [GHz] | [K] | [s-1] | IRAS 20126+4104 | IRAS 18089-1732 | G31.41+0.31 | |
|
|
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| HCOOH | ||||||
|
|
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| 222.110 | 72,6–71,7 | 43 | 1.9(–6) | <0.22 | <0.27 | <0.24 |
| 225.086 | 104,7– 94,6 | 110 | 1.0(–4) | <0.18 | <0.18 | <1.97 (1.70): |
| 225.091 | 104,6– 94,5 | 110 | 1.0(–4) | <0.18 | <0.18 | <1.97 (1.70): |
| 225.238 | 103,8–93,7 | 88 | 1.1(–4) | <0.19 | <0.39 (0.24): | <2.59 (0.78): |
| 330.931 | 43,1–42,2 | 39 | 5.1(–6) | <0.31 | <0.32 | ~0.47 (0.63) |
| 331.145 | 33,0–32,1 | 35 | 3.6(–6) | <0.29 | <0.29: | <2.77 (1.80): |
| 338.109 | 151,15–140,14 | 127 | 1.1(–5) | —- | – | <5.11 (3.10): |
| 338.202 | 153,13–143,12 | 158 | 4.1(–4) | —- | – | <13.55 (6.28): |
| 345.031 | 160,16–150,15 | 143 | 4.5(–4) | <0.26 | ~0.30 (0.30) | ~1.18 (0.70) |
| 345.253 | 143,12–142,13 | 142 | 8.3(–6) | <0.29 | <0.19: | <1.59 (1.01): |
| 354.448 | 170,17–161,16 | 161 | 1.3(–5) | <0.18 | <1.70 (0.57): | <6.42 (1.60): |
Notes.The notation a( − b) stands for a × 10− b. < Means upper limit. ~ Means uncertain detection, S/N ≲ 2. – Means frequency not observed. : Means blended line.
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