Fig. 14

X-ray colour-colour diagram of white dwarf accretors in the RBS (black – non-magnetic objects; blue – intermediate polars; red – polars). The location of J1730 is shown with error bars. The black line delineates a thermal spectrum with 10 keV absorbed by cold interstellar matter. Log NH varies between 19 and 22 in steps of 0.33 dex, increasing from left to right.
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