Redshifted Fe emission and the measure of the BH mass in ESO 198-G24

ESO 198G24 has a peculiar Fe line complex comprising a 6.4 keV emission linewith variable profile. In addition, a narrow emission line component at lowerenergy has also been detected in the two XMMNewton observations (at 5.7 keV and5.9 keV respectively). The study of the variability of the two emission featuresin a long XMMNewton observation will constrain their origin and potentiallyprovides the possibility of studying in detail the strong field regime ofGeneral Relativity. If the redshifted feature will turn out to originate in anorbiting spot, we will be able to give the first Xray estimate of the blackhole mass in ESO 198G24, as recently done by Iwasawa et al (2004) for NGC 3516. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]