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Fig. 4.


Astrometric position of the SB–T system and the C-band radio emission of the 2006 and 2016 epochs. The image is centered at RA = 274.5245616, Dec = −12.2425868. The different stellar components and the radio emission are represented in black for the 2006 epoch, and in white for the 2016 one. The SB is represented by a cross, the T with a dot. The projected orbital path is shown with a solid line. The 2006 C-band radio-emission is in colour scale contoured in black (representing 30, 50, 70, and 90% of the peak), while the 2016 one is only displayed in white contours. The thick-solid lines represent the 2D bow-shock profile from our geometrical model. The red diamond shows the Gaia astrometric measurement for the system in the 2016 epoch.

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