Fig. 1
VISTA image of the region around AX J0043–737. The image covers 1′ × 1′ sky area. TheRGB colours correspond to the J, H, and K VISTA filters, respectively. The red circle is centred on the XMM-Newton position of AX J0043–737 with a radius corresponding to a 3.439σ confidence error circle (including statistical and systematic errors.)
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