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Fig. 4


R Aqr central binary as seen in the CntHa (top left) and the N_Ha (top right) filters on October 11, 2014 (OBS284_0051). The contour plot shows the red giant for the CntHa filter (red) and the “pure” Hα emission in the N_Ha image after subtraction of the scaled and aligned CntHa frame (black). Contour levels are given for seven levels from 1000 to 7000 ct/pix.

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