. Author manuscript; available in PMC: 2020 Nov 24.

Published in final edited form as: Astron Astrophys. 2020 Oct 27;643:L6. doi: 10.1051/0004-6361/202039251

Table 3. Observed line parameters for HC₃NH⁺ and HNCCN⁺.

J_u	$v_{r e s t}^{a}$ (MHZ)	V_LSR (km s⁻¹)	∆v (km s⁻¹)	$\int T_{A}^{*} dv$ (mK km s⁻¹)	$T_{A}^{*}$ (mK)
HC₃NH⁺
4	34631.859	5.76±0.02	0.72±0.02	16.1±1	20.9
5	43289.740	5.74±0.02	0.52±0.01	18.1±1	32.7
HNCCN⁺
4^b	35503.840	5.86±0.03	0.76±0.07	6.1±1	7.5
4^c	35503.981	5.82±0.01	0.82±0.03	15.7±1	18.0
5	44379.851	5.86±0.02	0.90±0.04	22.9±1	23.8

Notes.

^(a)

Rest frequencies. The uncertainty is typically 2-3 kHz.

^(b)

Corresponds to the F=3-2 hyperfine component.

^(c)

Corresponds to the unresolved hyperfine components F=4-3 & 5-4

Table 3. Observed line parameters for HC3NH+ and HNCCN+.