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Table A.1.

Observed line parameters of 2-ECP.

Transition νpreda νobs b ∫ dv c Δv d e N
(JKa, Kc)u − (JKa, Kc)l (MHz) (MHz) (mK km s−1) (km s−1) (mK)
92, 7 − 82, 6 31804.974 ± 0.010 31804.956 ± 0.010 0.81 ± 0.14 0.88 ± 0.16 0.87 ± 0.18
91, 8 − 81, 7 31836.466 ± 0.009 31836.469 ± 0.010 0.80 ± 0.21 1.01 ± 0.25 0.74 ± 0.18
101, 10 − 91, 9 32128.912 ± 0.006 32128.929 ± 0.020 0.50 ± 0.12 0.82 ± 0.23 0.57 ± 0.16
100, 10 − 90, 9 32584.193 ± 0.006 A
102, 9 − 92, 8 33877.354 ± 0.008 ≤0.54 B
103, 8 − 93, 7 34371.631 ± 0.010 34371.645 ± 0.020 0.35 ± 0.13 0.53 ± 0.22 0.63 ± 0.16
103, 7 − 93, 6 34598.278 ± 0.012 34598.267 ± 0.010 0.47 ± 0.10 0.68 ± 0.20 0.65 ± 0.16
101, 9 − 91, 8 35232.520 ± 0.012 35232.541 ± 0.010 0.44 ± 0.08 0.70 ± 0.15 0.59 ± 0.16
111, 11 − 101, 10 35271.182 ± 0.009 35271.206 ± 0.020 0.25 ± 0.06 0.33 ± 0.20 0.65 ± 0.17 C
102, 8 − 92, 7 35477.328 ± 0.015 ≤0.55
110, 11 − 100, 10 35640.891 ± 0.008 35640.883 ± 0.010 0.30 ± 0.09 0.58 ± 0.17 0.50 ± 0.17
112, 10 − 102, 9 37187.287 ± 0.010 37187.341 ± 0.020 0.40 ± 0.12 1.12 ± 0.30 0.34 ± 0.16
113, 9 − 103, 8 37818.228 ± 0.014 ≤0.52
113, 8 − 103, 7 38176.533 ± 0.017 38176.490 ± 0.010 0.77 ± 0.14 1.02 ± 0.21 0.70 ± 0.16 D
121, 12 − 111, 11 38402.186 ± 0.012 38402.176 ± 0.010 0.40 ± 0.09 0.61 ± 0.16 0.62 ± 0.16
111, 10 − 101, 9 38575.843 ± 0.015 38575.866 ± 0.010 0.53 ± 0.12 0.54 ± 0.13 0.54 ± 0.16
120, 12 − 110, 11 38692.902 ± 0.012 38692.899 ± 0.010 0.41 ± 0.08 0.57 ± 0.15 0.67 ± 0.17
112, 9 − 102, 8 39139.995 ± 0.021 39140.044 ± 0.030 0.46 ± 0.14 0.97 ± 0.30 0.45 ± 0.17
122, 11 − 112, 10 40476.885 ± 0.014 E
123, 10 − 113, 9 41258.658 ± 0.019 41258.707 ± 0.020 0.45 ± 0.18 0.50 ± 0.18 0.90 ± 0.26 E
131, 13 − 121, 12 41523.491 ± 0.016 41523.514 ± 0.020 0.42 ± 0.15 0.62 ± 0.25 0.63 ± 0.24
130, 13 − 120, 12 41746.171 ± 0.016 41746.185 ± 0.020 0.53 ± 0.17 0.89 ± 0.27 0.56 ± 0.25
123, 9 − 113, 8 41795.647 ± 0.024 41795.617 ± 0.020 0.30 ± 0.11 0.54 ± 0.20 0.53 ± 0.20
121, 11 − 111, 10 41860.507 ± 0.018 41860.552 ± 0.010 0.39 ± 0.09 0.40 ± 0.15 0.99 ± 0.20
122, 10 − 112, 9 42779.782 ± 0.028 42779.776 ± 0.020 0.37 ± 0.10 0.66 ± 0.25 0.52 ± 0.20 F
132, 12 − 122, 11 43745.506 ± 0.017 ≤0.62
141, 14 − 131, 13 44636.685 ± 0.021 44636.635 ± 0.010 0.51 ± 0.13 0.55 ± 0.15 0.88 ± 0.24
140, 14 − 130, 13 44803.670 ± 0.021 44803.652 ± 0.010 1.05 ± 0.15 0.59 ± 0.10 1.68 ± 0.26 D
131, 12 − 121, 11 45083.511 ± 0.021 45083.564 ± 0.020 0.62 ± 0.15 0.48 ± 0.13 1.21 ± 0.30
133, 10 − 123, 9 45456.801 ± 0.033 45456.835 ± 0.020 0.38 ± 0.10 0.25 ± 0.20 1.43 ± 0.30
132, 11 − 122, 10 46386.401 ± 0.036 ≤0.9
142, 13 − 132, 12 46992.950 ± 0.021 46992.978 ± 0.010 0.60 ± 0.16 0.44 ± 0.14 1.26 ± 0.30
151, 15 − 141, 14 47743.272 ± 0.027 ≤0.9
150, 15 − 140, 14 47866.359 ± 0.027 ≤1.0

Notes. For the observational parameters we adopted the uncertainty of the Gaussian fit provided by GILDAS. Upper limits correspond to 3σ values.

(a)

Predicted frequency from the rotational and distortion constants derived from a fit to the lines observed by McCarthy et al. (2020) (see Sect. 3.1.1).

(b)

Observed frequency assuming a vLSR of 5.83 km s−1.

(c)

Integrated line intensity in mK km s−1.

(d)

Line width at half intensity derived by fitting a Gaussian function to the observed line profile (in km s−1).

(e)

Antenna temperature in millikelvin.

(A)

Blended with a negative feature resulting from the folding of the frequency switching data.

(B)

Possible blend with a negative feature (see note A). Fit unreliable.

(C)

Partially blended with a negative feature (see note A). Fit still possible.

(D)

Possible blend with an unidentified line. The line appears too strong compared with other transitions.

(E)

Fully blended with one of the hyperfine components of H2CCN.

(F)

Possible blend with an unidentified line. The derived intensity is in line with that of other transitions.

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