  The question of the origin of the hard X-ray/soft gamma-ray emission in
Centaurus A (Cen A) persists despite decades of observations. Results from
X-ray instruments suggest a jet origin since the implied electron temperature
(kT_e) would cause pair production runaway in the corona. In contrast,
instruments sensitive to soft gamma-rays report electron temperatures
indicating a corona origin may be possible. In this context, we analyzed
archival INTEGRAL/IBIS-ISGRI and SPI data and observations from a 2022 Cen A
monitoring program. Our analysis did not find any spectral variability. Thus we
combined all observations for long-term average spectra, which were fit with a
NuSTAR observation to study the 3.5 keV - 2.2 MeV spectrum. Spectral fits using
a CompTT model found kT_e ~ 550 keV, near pair-production runaway. The spectrum
was also well described by a log-parabola to model synchrotron self-Compton
emission from the jet. Additionally, a spectral fit with the 12-year catalog
Fermi/LAT spectrum using a log-parabola can explain the data up to ~ 3 GeV.
Above ~ 3 GeV, a power-law excess is present, which has been previously
reported in LAT/H.E.S.S. analysis. However, including a corona spectral
component can also describe the data well. In this scenario, the hard
X-rays/soft gamma-rays are due the corona and the MeV to GeV emission is due to
the jet.
