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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Detection of a 522 s pulsation from the transient X-ray source suzaku J0102.8-7204 (SXP 523) in the small magellanic cloud
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Detection of a 522 s pulsation from the transient X-ray source suzaku J0102.8-7204 (SXP 523) in the small magellanic cloud

机译：从小麦哲伦星云中的瞬态X射线源朱雀J0102.8-7204（SXP 523）检测到522 s脉动

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摘要

During a routine calibration observation of 1E 0102.27219 in the Small Magellanic Cloud (SMC), carried out in 2012 October for the Suzaku satellite, we detected a transient X-ray source at (RA, Dec) = (01h02 m47s,-72.°4m54s) in the equinox J2000.0 with a positional uncertainty of ～1."004. We conducted a temporal and spectral analysis of the source and found a coherent pulse signal with a period of 522.3 ± 0.1 s. We also found a featureless spectrum described by a single power-law model with a photon index of 1.0 +0.1 -0.1 and a 0.5.10 keV luminosity of ～8.8 × 1035 erg s-1 at an assumed distance of 60 kpc. The Suzaku source is likely to be the counterpart of 2XMMJ010247.4-720449, which has been observed several times, including outburst detected by Swift. Based on the X-ray characteristics from our data, as well as the transient record and optical and near-infrared features described in the literature, we conclude that this source is a high-mass X-ray binary pulsar with a Be star companion in the SMC, which is known to harbor an exceptionally large (～80) number of such sources compared to that in our Galaxy.
机译：在2012年10月对朱雀卫星进行的小麦哲伦星云（SMC）中1E 0102.27219的例行校准观测中，我们检测到（RA，Dec）=（01h02 m47s，-72。°）的瞬态X射线源。在春分J2000.0中的4m54s）中，位置不确定性约为-1。“ 004。我们对该源进行了时间和频谱分析，发现了一个周期为522.3±0.1 s的相干脉冲信号。我们还发现了一个无特征的频谱在假设距离为60 kpc时，用光子指数为1.0 +0.1 -0.1且光子指数为8.8×1035 erg s-1的0.5.10 keV亮度的单幂律模型描述。根据我们数据的X射线特征以及文献中描述的瞬态记录，光学和近红外特征，已经多次观察到了2XMMJ010247.4-720449的对应物，包括Swift探测到的爆发。我们得出的结论是，该源是具有Be星伴星的高质量X射线双星脉冲星SMC中的离子，与我们的Galaxy相比，拥有大量（〜80）这样的离子源。

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