We present detailed broadband timing and spectral analysis of the persistent , low luminosity and slowly spinning pulsar X Persei using a deep Suzaku observation of the source .
The spectrum is unusually hard with a cyclotron resonance scattering feature ( CRSF ) , the presence of which has been debated .
By comparing the spectral models relevant for accretion powered pulsars , we have obtained the best constraint on the broadband spectral model of X Persei obtained so far .
The CRSF is not confirmed in the average spectrum .
We have also identified , the presence of different intensity levels in the source with distinct changes in the pulse profile and energy spectrum indicating changes in the accretion geometry .
We further find evidence of a CRSF in the highest intensity levels at \sim 40 keV , indicating a magnetic field strength of 3.4 \times 10 ^ { 12 } G .