Figure 1
Positions of the water maser spots measured with the VLA 1995 (beam size ≃80 mas; T98), VLBA 1996 (beam size ≃0.5 mas; T2001a,b) and VLBA 2001–2002 (beam size ≃0.4 mas; this paper) data sets, overlaid on to the 1.3 cm continuum contour map showing the HW2 radio jet, and the HW3c, and HW3d radio sources (beam size ≃80 mas; T98). Colour code indicates the LSR radial velocity (km s−1) of the individual maser spots. Different subregions ‘R’ discussed in this paper are numbered (see Sections 3.1, 3.2 and 4, and Figs 2–4). Offsets positions are referred with respect to the HW2 position, (C2006).

Positions of the water maser spots measured with the VLA 1995 (beam size ≃80 mas; T98), VLBA 1996 (beam size ≃0.5 mas; T2001a,b) and VLBA 2001–2002 (beam size ≃0.4 mas; this paper) data sets, overlaid on to the 1.3 cm continuum contour map showing the HW2 radio jet, and the HW3c, and HW3d radio sources (beam size ≃80 mas; T98). Colour code indicates the LSR radial velocity (km s−1) of the individual maser spots. Different subregions ‘R’ discussed in this paper are numbered (see Sections 3.1, 3.2 and 4, and Figs 2–4). Offsets positions are referred with respect to the HW2 position, formula (C2006).

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