  The magnetar model involves an isolated neutron star with a very high
magnetic field (B~10^14-10^15 G), and is invoked to explain the emission
processes of two classes of sources, the Anomalous X-ray Pulsars (AXPs) and the
Soft Gamma-Ray Repeaters (SGRs). Five of them have been recently identified to
be persistent sources in the hard X-ray band (20-200 keV). AXPs, in particular,
present the hardest known persistent spectra in the hard X/soft gamma-ray
energy range. The broad band modeling of their spectra still suffers from the
non-simultaneity of the observations and from a lack of sensitivity above 20
keV. We present the Simbol X simulated observations of these objects and show
that that this mission could surely help to disentangle the contribution of the
different spectral components, and to understand how they contribute to the
secular flux variations observed in these sources.
