The gamma-ray source LSI +61°303
I. RXTE/ASM observations
Department of Physics, University of Calgary, Calgary, Canada T2N 1N4, Canada
Accepted: 1 October 2001
An analysis of RXTE/ASM observations of the unusual binary system LSI +61°303 is presented. The X-ray light curve gives a binary period of days, and an eccentricity of (1σ). The eccentricity is determined by fitting an inverse Compton model to the X-ray light curve. These are the best determinations to date, as the optical period and eccentricity have larger uncertainties and published values of the radio period are variable. The radio outburst peak is not phase locked to the binary period, so the radio period is not the same as the binary period.
Key words: stars: neutron / stars: individual: LSI +61°303 / stars: binaries: general / stars: emission line, Be / X-rays: stars / radio continuum: stars
© ESO, 2001