NuSTAR Observations of Candidate Subparsec Binary Supermassive Black Holes
We present an analysis of NuSTAR X-ray observations of three active galactic nuclei (AGN) that were identified as candidate subparsec binary supermassive black hole (SMBH) systems in the Catalina Real-Time Transient Survey based on apparent periodicity Highlighters in their optical light curves.Simulations predict that close-separation accreting SM