A. Vikhlinin

Chandra Observations of Candidate Subparsec Binary Supermassive Black Holes

S. Djorgovski, M. Graham, D. Walton, 2020 .

Chandra Observations of Candidate Subparsec Binary Supermassive Black Holes

S. Djorgovski, M. Graham, D. Walton, 2020, The Astrophysical Journal.

Clusters of galaxies

R. Sunyaev, A. Vikhlinin, A. Kravtsov, 2014 .

NuSTAR Observations of Candidate Subparsec Binary Supermassive Black Holes

S. Djorgovski, M. Graham, D. Walton, 2023, Astrophysical Journal.