Fig. 2
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Chandra diffuse X-ray emission around ζ Ophiuchi in units of counts s−1 pixel−1 with a 3σ contour line (0.3–2 KeV) overlayed. Coordinates are in parsecs relative to the position of the star assuming the distance to the star is 135 pc. The star is at the centre of the white circle and its emission has been subtracted from the image (see Sect. 2.2 for details).
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