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首页> 外文期刊>The Astrophysical journal >ROS AT/ASCA OBSERVATIONS OF A SERENDIPITOUS BL LACERTAE OBJECT PKS 2316-423: THE VARIABLE HIGH-ENERGY TAIL OF SYNCHROTRON RADIATION
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ROS AT/ASCA OBSERVATIONS OF A SERENDIPITOUS BL LACERTAE OBJECT PKS 2316-423: THE VARIABLE HIGH-ENERGY TAIL OF SYNCHROTRON RADIATION

机译：偶然性BL花边眼对象PKS 2316-423的ROS AT / ASCA观测：同步辐射的可变高能尾

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摘要

We present the analysis of archival data from ROSAT and ASCA of a serendipitous BL Lac object PKS 2316-423. Because of its featureless nonthermal radio/optical continuum, PKS 2316-423 has been called a BL Lac candidate in the literature. PKS 2316—423 was evidently variable over the multiple X-ray observations; in particular, a variable high-energy tail of the synchrotron radiation is revealed. The X-ray spectral analysis provides further evidence of the synchrotron nature of its broadband spectrum: a steep and downward-curving spectrum between 0.1 and 10 keV, typical of high-energy peaked BL Lac objects (HBLs). The spectral energy distribution (SED) through radio to X-ray yields the syn- chrotron radiation peak at frequency v_p = 7.3 x 10~(15) Hz, with integrated luminosity of L_(syn) = 2.1 x 10~(44) ergs s~(-1). The averaged SED properties of PKS 2316—423 are very similar to those "intermediate" BL Lac objects (IBLs) found recently in several deep surveys, such as Deep X-ray Radio Blazar, Radio-Emitting X-ray, and ROSAT-Green Bank surveys. We suggest that PKS 2316-423 is an IBL though it also shows some general features of an HBL. Actually, this double attribute of PKS 2316—423 provides a good test of the prediction that an IBL object can show either synchrotron or inverse Compton char- acteristics in different variability states.
机译：我们提出了对一个偶然的BL Lac对象PKS 2316-423的ROSAT和ASCA的档案数据的分析。由于其无特征的非热无线电/光学连续体，PKS 2316-423在文献中被称为BL Lac候选物。在多次X射线观察中，PKS 2316—423明显不同。特别地，揭示了同步加速器辐射的可变高能尾巴。 X射线光谱分析为宽带光谱的同步加速器性质提供了进一步的证据：陡峭且向下弯曲的光谱介于0.1到10 keV之间，这是高能峰BL Lac物体（HBL）的典型特征。通过无线电到X射线的光谱能量分布（SED）在频率v_p = 7.3 x 10〜（15）Hz时产生同步辐射峰，并且积分光度L_（syn）= 2.1 x 10〜（44）ergs s〜（-1）。 PKS 2316-423的平均SED属性与最近在一些深度调查中发现的“中间” BL Lac对象（IBL）非常相似，例如，深X射线无线电Blazar，放射X射线和ROSAT-Green银行调查。我们建议PKS 2316-423是IBL，尽管它也显示了HBL的一些常规功能。实际上，PKS 2316-423的双重属性很好地验证了IBL对象在不同的​​可变性状态下可以显示同步加速器或康普顿逆特性的预测。

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