  The electromagnetic source of dilaton is a first invariant
  of the electromagnetic field tensor. For
  electromagnetic waves, this invariant can be non zero only in the near zone.
  Pulsars and magnetars are natural sources of this type.
  We calculated the generation of dilatons by coherent
  electromagnetic field of rotating magnetic dipole moment
  of pulsars and magnetars. It is shown that the radiation of dilaton waves
  occurs at the two frequencies: the rotation frequency of the magnetic dipole
moment of the neutron star and the twice frequency.
  The generation of dilaton at the rotation frequency is maximal in the case
when the angle between the magnetic dipole moment and the axis of its rotation
is equal to 45 degree. If this angle is equal to 90 degree, then dilaton
radiation at the rotation frequency does not occur. The generation of dilaton
at the twice frequency is maximal in the case when the angle between the
magnetic dipole and the axis of its rotation is equal to 90 degree.
  Angular distribution of radiation of dilatons having a rotation frequency has
a maximum along conic surfaces 45 degree. Angular distribution of radiation of
dilatons having a frequency of the twice rotation frequency, has a maximum in
the plane which is perpendicular to the axis of rotation.
