Discovering a 5.72-d period in the supergiant fast X-ray transient AX J1845.0-0433
Hill, A. B.; Sidoli, L.; Bird, A. J.; McBride, V. A.; Bazzano, A.; Sguera, V.; Drave, S. P.; Goossens, M. E.
United Kingdom, Italy, United States, South Africa
Abstract
Temporal analysis of INTEGRAL/IBIS data has revealed a 5.7195 ± 0.0007 d periodicity in the supergiant fast X-ray transient source AX J1845.0-0433, which we interpret as the orbital period of the system. The new-found knowledge of the orbital period is utilized to investigate the geometry of the system by means of estimating an upper limit for the size of the supergiant (<27 R⊙) as well as the eccentricity of the orbit (ɛ < 0.37).