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Unveiling the super-orbital modulation of LSI +61 303 in X-rays

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arxiv 1210.6180 v1 pith:MFNTO6N2 submitted 2012-10-23 astro-ph.HE astro-ph.SR

Unveiling the super-orbital modulation of LSI +61 303 in X-rays

Jian Li , Diego F. Torres , Shu Zhang , Daniela Hadasch , Nanda Rea , G. Andrea Caliandro , Yupeng Chen , Jianmin Wang This is my paper
classification astro-ph.HE astro-ph.SR
keywords super-orbitalfoundmodulationcurveslightorbitalshiftx-ray
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We found evidence for the super-orbital modulation in the X-ray emission of LS I +61 303 from the longest monitoring date by the RXTE. The time evolution of the modulated fraction in the orbital light curves can be well fitted with a sinusoidal function having a super-orbital period of 1667 days. However, we have found a 281.8+/-44.6 day shift between the super-orbital variability found at radio frequencies and our X-ray data. We also find a super-orbital modulation in the maximum count rate of the orbital light curves, compatible with the former results, including the shift.

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