Fig. 1
Spectrum of the nucleus of NGC 4945 taken with Band 4b of Herschel-HIFI. Dotted lines indicate individual fit components and the solid line is the sum of these. The arrows indicate the systemic velocities for the H2O and H2O+ lines. The velocity scale refers to the H2O line, and is relative to a systemic velocity of V0 = 563 km s-1.
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