Search for Iron Line Pulsations in Cen X-3

The iron K line provides hints about accretion flows in accreting pulsars viathe line shape, strength and variability behavior. In Cen X3 line pulsationshave been detected, and the fluorescent line must originate close to the pulsar.But the picture is incomplete owing to the absence of observations which combinesufficient collecting area and spectral resolution. We propose a single 70 ksecobservation at a favorable range of orbital phase in order to confirm the likelysite of the fluorescent line, to better understand the geometry of thereprocessing gas, to better study the gas responsible for absorption at energiesabove the iron line, and to study the average properties of the stellar wind. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]