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Fig. 1
Comparison of spectra observed with the single-dish IRAM 30 m telescope towards L1157-B1 (black) and extracted from the NOEMA cube (red) in a circle equivalent to the HPBW = 28′′.5 of the IRAM 30 m telescope and centred in B1. Top panel: spectra of the H13CN (1–0) line. Bottom panel: spectra of the HC15N (1–0) line.
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