An X-Ray Counterpart of HESS J1427−608 Discovered with Suzaku
An X-Ray Counterpart of HESS J1427−608 Discovered with Suzaku
复制标题
DOI：
10.1093/pasj/65.3.61
复制
发表时间：
2013-01
影响因子：
2.3
通讯作者：
T. Fujinaga;K. Mori;A. Bamba;S. Kimura;T. Dotani;M. Ozaki;K. Matsuta;G. Puehlhofer;H. Uchiyama;J. Hiraga;H. Matsumoto;Y. Terada
中科院分区：
文献类型：
--
作者：
T. Fujinaga;K. Mori;A. Bamba;S. Kimura;T. Dotani;M. Ozaki;K. Matsuta;G. Puehlhofer;H. Uchiyama;J. Hiraga;H. Matsumoto;Y. Terada
我们报告发现了一个X射线对应的身份不明的非常高的能量伽马射线源HESS J1427-608。在与HESS J1427-608重合的天区中，在2-8 keV波段发现了一个扩展源，并将其命名为朱雀J1427-6051。如果用高斯近似，其X射线径向轮廓具有σ =0.9' +/-0.1'的延伸。在2-10 keV波段，该光谱符合吸收的幂律方程：N_H=（1.1 +/- 0.3）× 10^23 cm^-2，γ =3.1 + 0.6/-0.5，未吸收的通量F_X=（9 + 4/-2）× 10^-13 erg·s^-1 cm^-2。利用XMM-Newton档案资料，我们在朱雀源区发现了7个点源。然而，由于它们的总通量和吸收柱密度比朱雀J1427-6051低一个数量级以上，我们认为它们与朱雀源无关。因此，朱雀J1427-6051被认为是一个真正的扩散源和HESS J1427-608的X射线对应物。根据观测性质讨论了HESS J1427-608的可能性质。
We report the discovery of an X-ray counterpart of the unidentified very high energy gamma-ray source HESS J1427-608. In the sky field coincident with HESS J1427-608, an extended source was found in the 2-8 keV band, and was designated as Suzaku J1427-6051. Its X-ray radial profile has an extension of sigma=0.9' +/- 0.1' if approximated by a Gaussian. The spectrum was well fitted by an absorbed power-law with N_H=(1.1 +/- 0.3) times 10^23 cm^-2, Gamma=3.1 +0.6/-0.5, and the unabsorbed flux F_X=(9 +4/-2) times 10^-13 erg s^-1 cm^-2 in the 2-10 keV band. Using XMM-Newton archive data, we found seven point sources in the Suzaku source region. However, because their total flux and absorbing column densities are more than an order of magnitude lower than those of Suzaku J1427-6051, we consider that they are unrelated to the Suzaku source. Thus, Suzaku J1427-6051 is considered to be a truly diffuse source and an X-ray counterpart of HESS J1427-608. The possible nature of HESS J1427-608 is discussed based on the observational properties.