H1821+643: The most X-ray and infrared luminous AGN in the Swift/BAT survey in the process of rapid stellar and supermassive black hole mass assembly

Hikaru Fukuchi, Kohei Ichikawa, Masayuki Akiyama +6

H1821+643 is the most X-ray luminous non-beamed AGN of $L_{14-150keV}=5.2\times 10^{45}$ erg s${}^{-1}$ in the Swift/BAT ultra-hard X-ray survey and it is also a hyper-lumin…