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Cross-correlation of X-rays for 4U 1608–52

Published online by Cambridge University Press:  21 February 2013

Y. J. Lei ,
H. T. Zhang ,
A. L. Luo  and
Y. H. Zhao
Y. J. Lei
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China email: leiyjcwmy@163.com
H. T. Zhang
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China email: leiyjcwmy@163.com
A. L. Luo
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China email: leiyjcwmy@163.com
Y. H. Zhao
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China email: leiyjcwmy@163.com
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Abstract

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We study the cross-correlation between X-rays of different energies for the atoll-type source 4U 1608–52 with RXTE, and find the cross-correlation evolutes along the different branches. The anti-correlation is reported from the Galactic black hole candidates and Z-type luminous sources in their hard states. Our results are a little different from the Z-type sources. Here we provide the first evidence that a similar anti-correlated feature can also be found in atoll-type source, and it is not corresponding to the lowest accretion rate.

Keywords

X-rays binaryaccretion ratecross-correlation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S290: Feeding Compact Objects: Accretion on All Scales , August 2012 , pp. 249 - 250
Copyright
Copyright © International Astronomical Union 2013

References

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