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Table 2

Observational data.

Source Telescope Freq. coverage (GHz) Resolution (kHz) Noise (mK) Line density References
Sgr B2(N) IRAM 30 m 79.989–115.984 320 24 102 Belloche et al. (2013)
Sgr B2(M) IRAM 30 m 79.989–115.984 320 25 26 Belloche et al. (2013)
G34.26+0.15 IRAM 30 m 84.276–115.745 200 20 (9.4) (19.8) Csengeri et al. (2016)
CygX-N63 IRAM 30 m 82.350–117.502 200 2.9 (1.9) (12.7) Fechtenbaum et al. (2015)

Notes. In parentheses the measured noise and computed line density for the resampled spectra to a resolution of 1 MHz.

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