Cyclotron Resonance Energies at a Low X-Ray Luminosity: A0535+262 Observed with Suzaku
Cyclotron Resonance Energies at a Low X-Ray Luminosity: A0535+262 Observed with Suzaku
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DOI：
10.1086/508018
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发表时间：
2006-07
期刊：
影响因子：
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通讯作者：
Y. Terada;T. Mihara;M. Nakajima;M. Suzuki;N. Isobe;K. Makishima;H. Takahashi;T. Enoto;M. Kokubun;T. Kitaguchi;S. Naik;T. Dotani;F. Nagase;T. Tanaka;S. Watanabe;S. Kitamoto;K. Sudoh;A. Yoshida;Y. Nakagawa;S. Sugita;T. Kohmura;T. Kotani;D. Yonetoku;L. Angelini;J. Cottam;K. Mukai;R. Kelley;Y. Soong;M. Bautz;S. Kissel;J. Doty
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文献类型：
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作者：
Y. Terada;T. Mihara;M. Nakajima;M. Suzuki;N. Isobe;K. Makishima;H. Takahashi;T. Enoto;M. Kokubun;T. Kitaguchi;S. Naik;T. Dotani;F. Nagase;T. Tanaka;S. Watanabe;S. Kitamoto;K. Sudoh;A. Yoshida;Y. Nakagawa;S. Sugita;T. Kohmura;T. Kotani;D. Yonetoku;L. Angelini;J. Cottam;K. Mukai;R. Kelley;Y. Soong;M. Bautz;S. Kissel;J. Doty
2005年9月14日，朱雀X射线天文台观测到了X射线脉冲双星A0535+262，净曝光量为22 ks。该源正处于一次小爆发的衰减阶段，在假定的2千秒差距距离上显示出3-50千电子伏的光度约为3.7 × 1035尔格·秒-1。尽管源强度非常低（在20 keV下约为30 mcrab），但它的电子回旋共振被朱雀硬X射线探测器清楚地探测到，在约45 keV下吸收。共振能量被发现是基本上相同的测量时，源几乎是2个数量级更明亮。这些结果进行了比较与亮度依赖的变化，从4U 0115+63和X 0331 +53观察到的回旋共振能量。
The binary X-ray pulsar A0535+262 was observed with the Suzaku X-ray observatory on 2005 September 14 for a net exposure of 22 ks. The source was in the declining phase of a minor outburst, exhibiting 3-50 keV luminosity of ~3.7 × 1035 ergs s-1 at an assumed distance of 2 kpc. In spite of the very low source intensity (about 30 mcrab at 20 keV), its electron cyclotron resonance was detected clearly with the Suzaku Hard X-Ray Detector, in absorption at about 45 keV. The resonance energy is found to be essentially the same as that measured when the source is almost 2 orders of magnitude more luminous. These results are compared with the luminosity-dependent changes in the cyclotron resonance energy, observed from 4U 0115+63 and X0331+53.