We present X-ray timing and spectral analyses of simultaneous 150 ks Nuclear Spectroscopic Telescope Array ( NuSTAR ) and Suzaku X-ray observations of the Seyfert 1.5 galaxy NGC 4151 .
We disentangle the continuum emission , absorption , and reflection properties of the active galactic nucleus ( AGN ) by applying inner accretion disk reflection and absorption-dominated models .
With a time-averaged spectral analysis , we find strong evidence for relativistic reflection from the inner accretion disk .
We find that relativistic emission arises from a highly ionized inner accretion disk with a steep emissivity profile , which suggests an intense , compact illuminating source .
We find a preliminary , near-maximal black hole spin a > 0.9 accounting for statistical and systematic modeling errors .
We find a relatively moderate reflection fraction with respect to predictions for the lamp post geometry , in which the illuminating corona is modeled as a point source .
Through a time-resolved spectral analysis , we find that modest coronal and inner disk reflection flux variation drives the spectral variability during the observations .
We discuss various physical scenarios for the inner disk reflection model , and we find that a compact corona is consistent with the observed features .