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Fig. 7


Average on-nucleus spectrum of the HCN (3–2) line at 265886.434 MHz obtained with the IRAM 30 m telescope between 23 and 24 January 2018. Scalesare as in Fig. 3. Relative intensities and positions of the hyperfine components relative to F = 3 − 2 line at 265886.434 MHz are indicated.

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