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Table 1

The HO2 and SO2 lines detected in the same setups.

Line Frequency Quantum numbers Aul Eu gu dv Δv vlsr
(GHz) Rotation Ju → Jl Fu → Fl (s-1) (K) (mK s-1) (km s-1) (km s-1)

1 130.26007 20,2 → 10,1 5/2  →  3/2 3  →  2 2.07  ×  10-5 9.4 7 74  ±  7 0.66  ±  0.07 4.6  ±  0.1
2 130.25813 20,2 → 10,1 5/2  →  3/2 2  →  1 1.85  ×  10-5 9.4 5 54  ±  8 0.65  ±  0.11 4.6  ±  0.1
3 130.46741 20,2 → 10,1 3/2  →  1/2 2  →  1 1.76  ×  10-5 9.4 5 45  ±  4 0.54  ±  0.06 3.0  ±  0.1
130.46368 20,2 → 10,1 3/2  →  1/2 1  →  0 1.16  ×  10-5 9.4 3 <26

4a 260.56614 40,4 → 30,3 9/2  →  7/2 5  →  4 1.86  ×  10-4 31.3 11 } 115  ±  14 } 0.88  ±  0.13
4b 260.56566 40,4 → 30,3 9/2  →  7/2 4  →  3 1.81  ×  10-4 31.3 9
5a 260.77030 40,4 → 30,3 7/2  →  5/2 4 → 3 1.80  ×  10-4 31.3 9 }  61  ±  13 } 0.91  ±  0.24
5b 260.76967 40,4 → 30,3 7/2  →  5/2 3  →  2 1.72  ×  10-4 31.3 7

SO2 129.51481 102,8  →  101,9 199  ±  6 0.64  ±  0.02 3.8  ±  0.1
SO2 131.01486 121,11  →  120,12 168  ±  5 0.68  ±  0.03 3.7  ±  0.1

Notes. For lines 1 to 3 and SO2, the frequencies are those measured in the laboratory and tabulated in the JPL database. The vlsr of the lines are therefore computed based on these frequencies. The hyperfine structure frequencies of lines 4 and 5 were computed from the energies tabulated in the JPL database (http://spec.jpl.nasa.gov/ftp/pub/catalog/archive/c033001.egy). Uncertainties on fluxes, linewidths and vlsr are 1σ. The upper limit on the F = 1 → 0 line is the flux of the bump at the expected frequency (see Fig. 2).

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