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Fig. 1

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NH3(1,1) inversion line spectrum towards the ammonia maximum as observed with the Parkes 64 m telescope (upper spectrum), at the offset (+ 10″, − 14″) from Cha-MMS1a (Reipurth et al. 1996). The corresponding ATCA spectrum “smoothed” to an 80″ resolution is shown at the bottom. The latter is produced by applying a Gaussian taper to the visibility data.

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