We present an analysis of the X-ray active galactic nucleus (AGN) population in a sample of seven massive galaxy clusters in the redshift range 0.35<z6.8x10^42^erg/s, within r~<2r_500_ (approximately the virial radius), we find that the cluster AGN space density scales with cluster mass as ~M^(-2.0+0.8-0.9)^. This result rules out zero mass dependence of the cluster X-ray AGN space density at the 2.5{sigma} level. We compare our cluster X-ray AGN sample to a control field with identical selection and find that the cluster AGN fraction is significantly suppressed relative to the field when considering the brightest galaxies with V<21.5. For fainter galaxies, this difference is not present. Comparing the X-ray hardness ratios of cluster member AGN to those in the control field, we find no evidence for enhanced X-ray obscuration of cluster member AGN. Lastly, we see tentative evidence that disturbed cluster environments may contribute to enhanced AGN activity.

Cone search capability for table J/MNRAS/498/4095/allspecz (Catalogue of the 1912 reliable redshifts acquired in this study)