We have obtained a deep , simultaneous observation of the bright , nearby Seyfert galaxy IC 4329A with Suzaku and NuSTAR .
Through a detailed spectral analysis , we are able to robustly separate the continuum , absorption and distant reflection components in the spectrum .
The absorbing column is found to be modest ( \sim 6 \times 10 ^ { 21 } \hbox { $ { \thinspace cm } ^ { -2 } $ } ) , and does not introduce any significant curvature in the Fe K band .
We are able to place a strong constraint on the presence of a broadened Fe K \alpha line ( E _ { rest } = 6.46 ^ { +0.08 } _ { -0.07 } { \thinspace keV } with \sigma = 0.33 ^ { +0.08 } _ { -0.07 } { \thinspace keV } and EW = 34 ^ { +8 } _ { -7 } { \thinspace eV } ) , though we are not able to constrain any of the parameters of a relativistic reflection model .
These results highlight the range in broad Fe K line strengths observed in nearby , bright AGN ( roughly an order of magnitude ) , and imply a corresponding range in the physical properties of the inner accretion disk in these sources .
We have also updated our previously reported measurement of the high-energy cutoff of the hard X-ray emission using both observatories rather than just NuSTAR alone : E _ { cut } = 186 \pm 14 { \thinspace keV } .
This high-energy cutoff acts as a proxy for the temperature of the coronal electron plasma , enabling us to further separate this parameter from the plasma ’ s optical depth and to update our results for these parameters as well .
We derive kT = 50 ^ { +6 } _ { -3 } { \thinspace keV } with \tau = 2.34 ^ { +0.16 } _ { -0.11 } using a spherical geometry , kT = 61 \pm 1 { \thinspace keV } with \tau = 0.68 \pm 0.02 for a slab geometry , with both having an equivalent goodness-of-fit .