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Fig. 2

image

22 GHz H2O maser spectrum detected toward the WF IRAS 180432116. The systemic velocity derived for the stellar source from the OH maser spectrum is vlsr, = 87.5 km s-1 (vertical dashed line, Deacon et al. 2004). The final spectral resolution is Δv = 0.42 km s-1, and the total velocity range covered by the maser spectral features is 400 km s-1.

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