The Cerenkov iron Kα line in Active Galactic Nuclei – calculation in the optically thin caseL. Chen, D. B. Liu, Y. D. Xu, J. H. You, A. F. Yuan and W. P. ChenA&A, 428 3 (2004) 717-721DOI: https://doi.org/10.1051/0004-6361:20047029