1. Testing the Binary Hypothesis: Pulsar Timing Constraints on Supermassive Black Hole Binary Candidates Sesana, Alberto; Haiman, Zoltan; Kocsis, Bence; Kelley, Luke Zoltan 2018 Articles Black holes (Astronomy)Pulsars--DetectionAstronomy--Mathematical modelsBinary starsGravitational wavesAstrophysics