Supermassive Black Hole Spin and Reverberation

A. Zoghbi, D. R. Wilkins, L. Brenneman, G. Miniutti, G. Matt, J. Garcia, E. Kara, E. Cackett, B. De Marco, M. Dovciak, 2019. Whitepaper submitted to the 2020 Decadal Survey

X-ray reverberation mapping has emerged as a powerful probe of microparsec scales around AGN, and with high sensitivity detectors, its full potential in echo-mapping the otherwise inaccessible disk-corona at the black hole horizon scale will be revealed.