| Issue |
A&A
Volume 380, Number 2, December III 2001
|
|
|---|---|---|
| Page(s) | 516 - 519 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361:20011390 | |
| Published online | 15 December 2001 | |
The gamma-ray source LSI +61°303
I. RXTE/ASM observations
Department of Physics, University of Calgary, Calgary, Canada T2N 1N4, Canada
Received:
19
June
2001
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
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