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Table A.2.

Observed line parameters of 1-ECP.

Transition νpreda νobsb dv c Δv d e N
(JKa, Kc)u − (JKa, Kc)l (MHz) (MHz) (mK km s−1) (km s−1) (mK)
93, 6 − 83, 5 31125.481 ± 0.003 ≤0.53
92, 7 − 82, 6 31859.742 ± 0.004 ≤0.55
91, 8 − 81, 7 31919.294 ± 0.003 31919.294 ± 0.020 0.35 ± 0.09 0.55 ± 0.25 0.44 ± 0.15 A
101, 10 − 91, 9 32243.744 ± 0.006 32243.721 ± 0.015 0.61 ± 0.11 0.91 ± 0.18 0.64 ± 0.14
100, 10 − 90, 9 32711.504 ± 0.005 B
102, 9 − 92, 8 33976.618 ± 0.005 33976.611 ± 0.010 0.44 ± 0.10 0.73 ± 0.18 0.57 ± 0.15
103, 8 − 93, 7 34456.710 ± 0.004 ≤0.55
103, 7 − 93, 6 34670.863 ± 0.005 ≤0.51
101, 9 − 91, 8 35330.100 ± 0.004 35330.107 ± 0.010 0.80 ± 0.14 1.20 ± 0.30 0.52 ± 0.16
111, 11 − 101, 10 35398.929 ± 0.008 35398.938 ± 0.020 0.57 ± 0.15 0.82 ± 0.29 0.65 ± 0.18
102, 8 − 92, 7 35538.796 ± 0.005 ≤0.50 C
110, 11 − 100, 10 35781.534 ± 0.008 35781.525 ± 0.010 0.54 ± 0.10 0.73 ± 0.15 0.70 ± 0.18
112, 10 − 102, 9 37298.932 ± 0.006 ≤0.50 D
113, 9 − 103, 8 37912.444 ± 0.005 ≤0.55
113, 8 − 103, 7 38251.486 ± 0.007 ≤0.59
121, 12 − 111, 11 38542.888 ± 0.011 38542.877 ± 0.015 0.28 ± 0.08 0.71 ± 0.22 0.37 ± 0.13
111, 10 − 101, 9 38690.146 ± 0.005 38690.125 ± 0.015 0.71 ± 0.12 0.98 ± 0.18 0.65 ± 0.14
120, 12 − 110, 11 38845.920 ± 0.011 ≤0.51
112, 9 − 102, 8 39210.161 ± 0.007 39210.148 ± 0.020 0.35 ± 0.10 0.77 ± 0.30 0.41 ± 0.16 E
122, 11 − 112, 10 40601.469 ± 0.009 40601.428 ± 0.020 0.27 ± 0.09 0.28 ± 0.15 0.55 ± 0.20 F
123, 10 − 113, 9 41362.551 ± 0.007 ≤< 0.60
131, 13 − 121, 12 41677.124 ± 0.015 ≤< 0.66 G
123, 9 − 113, 8 41871.672 ± 0.009 ≤< 0.70
130, 13 − 120, 12 41910.880 ± 0.015 41910.870 ± 0.015 0.37 ± 0.12 0.60 ± 0.25 0.58 ± 0.18
121, 11 − 111, 10 41993.447 ± 0.007 41993.453 ± 0.025 0.64 ± 0.15 0.70 ± 0.32 0.86 ± 0.20 H
122, 10 − 112, 9 42860.722 ± 0.010 42860.741 ± 0.015 0.54 ± 0.14 0.61 ± 0.19 0.83 ± 0.22
132, 12 − 122, 11 43883.551 ± 0.011 ≤0.60
141, 14 − 131, 13 44803.174 ± 0.019 ≤0.76
133, 11 − 123, 10 44804.061 ± 0.009 ≤0.69
140, 14 − 130, 13 44979.670 ± 0.019 ≤0.87
131, 12 − 121, 11 45236.599 ± 0.010 ≤0.92
133, 10 − 123, 9 45533.079 ± 0.013 ≤1.05
132, 11 − 122, 10 46480.158 ± 0.012 ≤0.91
142, 13 − 132, 12 47144.916 ± 0.015 ≤1.15
151, 15 − 141, 14 47922.512 ± 0.025 I
150, 15 − 140, 14 48053.480 ± 0.025 ≤1.15
143, 12 − 133, 11 48234.023 ± 0.012 ≤1.25
141, 13 − 131, 12 48420.229 ± 0.013 48420.188 ± 0.015 0.55 ± 0.13 0.48 ± 0.12 1.0 ± 0.29
143, 11 − 133, 10 49233.211 ± 0.017 ≤1.18

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. 3.1.2).

(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)

Marginal detection.

(B)

Blended with the J = 29-28 transition of HC7N at 32711.672 MHz.

(C)

A 2.5σ feature appears at the predicted frequency.

(D)

A 0.4 mK feature appears at -83 kHz of the predicted frequency. The line profile is affected in its blue frequency wing by a negative feature produced in the folding of the frequency switching data. Fit unreliable.

(E)

The line is blended with two unidentified features. Doubtful fit.

(F)

Possible blend with a negative feature in the red wing of the line profile. Doubtful fit.

(G)

Feature of 0.5 mK at -130 kHz. It cannot be assigned to 1-ECP.

(H)

The line is blended in its red wing with a unknown feature. Doubtful fit.

(I)

The line is fully blended with a negative feature produced in the folding of the frequency switching data.

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