HyGAL: Characterizing the Galactic ISM with observations of hydrides and other small molecules - II. The absorption line survey with the IRAM 30 m telescope

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Table 4

Continuum levels and rms noise of the spectra.

Source	HCO⁺		HCN		HNC		CS		H₂S		C₂H		c-C₃H₂

	T_c (K)	T_rms (K)	T_c (K)	T_rms (K)	T_c (K)	T_rms (K)	T_c (K)	T_rms (K)	T_c (K)	T_rms (K)	T_c (K)	T_rms (K)	T_c (K)	T_rms (K)
W3 IRS5	0.525	0.007	0.514	0.008	0.509	0.007	0.418	0.005	0.181	0.012	0.566	0.010	0.606	0.008
W3(OH)	0.626	0.006	0.626	0.009	0.647	0.008	0.589	0.005	0.551	0.011	0.638	0.009	0.629	0.009
NGC 6334 I	0.427	0.010	0.531	0.013	0.464	0.014	0.677	0.017	1.031	0.048	0.455	0.014	0.438	0.013
HGAL0.55–0.85	0.116	0.008	0.111	0.008	0.116	0.009	0.141	0.006	0.257	0.014	0.112	0.009	0.109	0.009
G09.62+0.19	0.075	0.008	0.073	0.008	0.077	0.009	0.075	0.005	0.098	0.013	0.076	0.009	0.076	0.009
G10.47+0.03	0.117	0.006	0.122	0.009	0.121	0.008	0.159	0.005	0.367	0.015	0.115	0.011	0.115	0.007
G19.61−0.23	0.353	0.004	0.353	0.007	0.366	0.006	0.384	0.005	0.325	0.011	0.370	0.006	0.379	0.006
G29.96−0.02	0.439	0.004	0.439	0.008	0.458	0.007	0.390	0.008	0.182	0.024	0.456	0.007	0.472	0.007
W43 MM1	0.059	0.004	0.059	0.009	0.069	0.005	0.116	0.010	0.256	0.024	0.065	0.006	0.060	0.005
G31.41+0.31	0.155	0.006	0.155	0.009	0.158	0.006	0.167	0.006	0.271	0.013	0.167	0.008	0.161	0.007
G32.80+0.19	0.497	0.004	0.486	0.007	0.506	0.008	0.480	0.003	0.330	0.008	0.516	0.008	0.523	0.007
G45.07+0.13	0.194	0.004	0.194	0.005	0.201	0.006	0.191	0.004	0.183	0.011	0.199	0.005	0.198	0.005
DR21	1.500	0.005	1.490	0.009	1.496	0.009	1.540	0.006	0.751	0.012	1.563	0.008	1.590	0.008
NGC 7538 IRS1	0.408	0.005	0.401	0.008	0.415	0.008	0.387	0.005	0.369	0.011	0.406	0.009	0.402	0.008

Notes. The continuum and rms noise levels are on the scale, with a spectral resolution (Δυ) of 0.8 km s⁻¹ for all species except for H₂S for which Δυ = 0.36 km s⁻¹.

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