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Fig. 8


Spectral energy distribution for HS0922+1333 showing 2MASS data (black squares), the optical spectrum (black line, Reimers & Hagen 2000), XMM-OM data for orbital bright and faint phase (blue squares), GALEX data (black triangles), and in the X-ray regime the EPIC-PN spectrum for orbital faint (blue line) and bright (black line) phase. The horizontal dashed line indicates the ROSAT upper limit, blue small vertical lines indicate the cyclotron harmonics for the secondary accretion spot (81 MG) and red vertical lines for the primary accretion spot (66 MG). Superimposed is a model atmosphere for a 0.6 M white dwarf with a temperature of 8000 K and a distance of 140 pc.

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