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arXiv 1003.2969astro-ph.HE
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用INTEGRAL、RXTE和Suzaku观察到的A 0535+26的特殊爆发

Peculiar outburst of A 0535+26 observed with INTEGRAL, RXTE and Suzaku

I. Caballero, K. Pottschmidt, L. Barragan, C. Ferrigno, P. Kretschmar, S. Suchy, J. Wilms, A. Santangelo, I. Kreykenbohm, R. Rothschild, D. Klochkov, R. Stauber… 展开作者

I. Caballero, K. Pottschmidt, L. Barragan, C. Ferrigno, P. Kretschmar, S. Suchy, J. Wilms, A. Santangelo, I. Kreykenbohm, R. Rothschild, D. Klochkov, R. Staubert, M. H. Finger, A. Camero-Arranz, K. Makishima, T. Mihara, M. Nakajima, T. Enoto, W. Iwakiri, Y. Terada

摘要:

Be/X射线双星系统A0535+26在2009年8月发生了一次正常的爆发。这是发生在源的近星点附近的一系列正常爆发中的第四次,但由于在较早的轨道阶段开始并呈现出特殊的双峰光变曲线而不寻常。第一次“耀斑”(从MJD 55043开始持续约9天)达到440 mCrab的通量。然后流量下降到小于220 mCrab,并再次增加,在MJD 55057的近星点周围达到440 mCrab。利用INTEGRAL、RXTE和朱雀进行了机会目标观测。这些观测的第一个结果,特别强调的回旋线存在于X射线光谱的源,以及在脉冲周期和能量依赖的脉冲轮廓的源。

英文摘要:

A normal outburst of the Be/X-ray binary system A0535+26 has taken place in August 2009. It is the fourth in a series of normal outbursts that have occured around the periastron passage of the source, but is unusual by starting at an earlier orbital phase and by presenting a peculiar double-peaked light curve. A first "flare" (lasting about 9 days from MJD 55043 on) reached a flux of 440 mCrab. The flux then decreased to less than 220 mCrab, and increased again reaching 440 mCrab around the periastron at MJD 55057. Target of Opportunity observations have been performed with INTEGRAL, RXTE and Suzaku. First results of these observations are presented, with special emphasis on the cyclotron lines present in the X-ray spectrum of the source, as well as in the pulse period and energy dependent pulse profiles of the source.

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