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Fig. 3.

image

Observed lines of HC3NH+ (a) and of HNCCN+ (b). The abscissa corresponds to the local standard of rest velocity in km s−1. Frequencies and intensities for the observed lines are given in Table 3. The ordinate is the antenna temperature corrected for atmospheric and telescope losses in mK. The J = 4 − 3 line of HNCCN+ shows two components due to the hyperfine structure introduced by the external nitrogen atom. Spectral resolution is 38.1 kHz.

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