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Spectrum and timing phenomena in IGR J17091-3624 2011 outburst

Published online by Cambridge University Press:  21 February 2013

Z. Zhang ,
J. L. Qu ,
H. Q. Gao  and
J. N. Zhou
Z. Zhang
Affiliation:
Institute of High Energy Physics, Beijing 100049, P.R. China email: zhangzhen@ihep.ac.cn
J. L. Qu
Affiliation:
Institute of High Energy Physics, Beijing 100049, P.R. China email: zhangzhen@ihep.ac.cn
H. Q. Gao
Affiliation:
Institute of High Energy Physics, Beijing 100049, P.R. China email: zhangzhen@ihep.ac.cn
J. N. Zhou
Affiliation:
Institute of High Energy Physics, Beijing 100049, P.R. China email: zhangzhen@ihep.ac.cn
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Abstract

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X-ray source IGR J17091-3624 was discovered by INTEGRAL observatory on 2003 April (Kuulkers 2003). A outburst was detected with Swift/Burst Alert Telescope (BAT) in late January 2011 (Krimm 2011). IGR J17091-3624 has a similar timing phenomena to microquasar GRS 1915+105(Belloni 2000; Altamirano 2011). We have analyzed the evolution of temporal and spectral characteristic of IGR J17091-3624 during the 2011 outburst. We find that (1) all the QPOs can be divided into two types, QPO-AB and QPO-C, (2) a small outburst tracks clockwise in the HID, (3) the relationship between hardness and disk color temperature forms a V-shape. Those results will give a strong constraint on the disk radiative process.

Keywords

X-ray binaryquasi-periodic oscillation (QPO)thermal viscous instability
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S290: Feeding Compact Objects: Accretion on All Scales , August 2012 , pp. 364 - 366
Copyright
Copyright © International Astronomical Union 2013

References

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