The OJ287 Supermassive Binary Black Hole Model and the New Unified Scheme for the AGNS

It has been suggested already a very long time ago that supermassive binary black holes (SMBBHs) may exist in the nuclei of the Active Galactic Nuclei (AGN) (e.g. Begelman, Blandford and Rees 1980). To prove this observationally is an extremely difficult task.