Select a quasar/AGN catalog...
Sloan Digital Sky Survey DR16Q_v4 (2020)
Sloan Digital Sky Survey DR12Q (2015)
Quasars and Active Galactic Nuclei (7th Ed., 1996)
Quasars and Active Galactic Nuclei (13th Ed., 2010)
LCDM H0 = 67.6
LCDM H0 = 73.0
TDP H = 70.5
Divide the volume by
Absolute magnitude threshold:
±0.5
Absolute magnitude