Revealing Fundamental Physical Properties of AGN with NuSTAR, XMM and Suzaku

In its first year of operation, the NuSTAR X-ray telescope has opened a new window onto the high-energy universe by providing the first focused images and high signal-to-noise (S/N) data in the 3-80 keV band. The broad energy range of NuSTAR has revolutionized our ability to probe the physics at work in the cores of active galactic nuclei (AGN) around supermassive black holes (SMBHs). Obtaining simultaneous observations with NuSTAR and lower-energy X-ray telescopes such as XMM-Newton or Suzaku provides the best S/N across the broadband X-ray spectrum ever achieved, enabling the continuum, absorption and reflection components of these AGN to be definitively deconvolved for the first time. Isolating these components allows their physical processes to be studied with greater precision and accuracy than has hitherto been possible. We present results from three simultaneous campaigns carried out by NuSTAR in conjunction with XMM or Suzaku: IC 4329A, MCG--6-30-15 and NGC 1365. In each case, NuSTAR's unique strengths have led to unprecedented insights into coronal properties, absorbing structures and/or black hole spin.