€Intermediate Polars spin variability can be explained in several ways (much debate on this over the years)
–visibility of the accretion region on the white
dwarf
–visibility of the accretion ³curtains²
–reprocessing of flux on the disk (optical/UV)
€From studies of the relative phasing in different
wavelength bands and including to the absorption effects now known
to be a combination of the above models leading to the
complex behaviour in Intermediate Polar light curves