2AO526-328 - the White Dwarf Rotation Period Revealed
van Paradijs, J.; van der Klis, M.; King, A. R.; Watson, M. G.; van der Woerd, H.; Brinkman, A. C.; Schrijver, J.
Netherlands, United Kingdom, France
Abstract
We report results from EXOSAT observations of the intermediate polar system 2A0526-328 (TV Col). The hard X-ray emission (2 8 keV) is modulated with a period of 1943 s, interpreted as the white-dwarf rotation period. Soft and hard X-ray emission show intensity minima, in phase with the orbital period of 0.2286 days; analysis of the hard X-ray spectra shows that these minima are caused by an extra low-energy absorption corresponding to a H column density of 4 × 1022 cm-2.