Optically bright active galactic nuclei in the ROSAT-Faint source catalogue

Optically bright active galactic nuclei in the ROSAT-Faint source catalogue

Veron-Cetty, M.-P.; Balayan, S. K.; Mickaelian, A. M.; Mujica, R.; Chavushyan, V.; Hakopian, S. A.; Engels, D.; Veron, P.; Zickgraf, F.-J.; Voges, W.; Xu, D.-W.

A&A 414,487