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Fig. 5
H2O 312–303 spectra at 1097 GHz towards SMM1, IRAS 2A, IRAS 4A and IRAS 4B observed at two different epochs. The offset component towards IRAS 4A has doubled in intensity, as shown by the two Gaussian fits in magenta. All spectra are shifted such that the source velocity is at 0 km s-1.
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