Fig. 1
Nitrogen hydrides towards W49N: double sideband WBS spectra of NH, ortho-NH2, ortho- and para-NH3, and NH+ over the LSR velocity range –50 to 85 km s-1. Quantum numbers are found in Table 1. Note that we only analyse the absorption in the velocity range 30 − 75 km s-1 in this paper and leave the source absorption and emission for a future paper.
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