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   81352
   Compact objects with extremely strong ionized Fe emission lines, with
   the equivalent width reaching about 4000 eV, have been discovered with
   ASCA, including AX~J1842.8-0423 and RX~J1802.1+1804. These objects are
   thought to be binary systems containing magnetized white dwarf (WD).  A
   possible interpretation of the strong Fe-K line is the line-photon
   beamingin the WD accretion column, due to resonance scattering of line
   photons augmented by the vertical velocity gradient there. RX
   J1015.5+0904 has a good geometry for checking how the line equivalent
   widths of many ion species change as the white dwarf rotates. This
   object has already show the tendency of an enhancement of He-like Fe K
   alpha line in pole-on pha
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