ASCA X-Ray Source Catalog in the Galactic Center Region
ASCA X-Ray Source Catalog in the Galactic Center Region
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DOI：
10.1086/324020
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发表时间：
2001-08
期刊：
影响因子：
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通讯作者：
M. Sakano;K. Koyama;H. Murakami;Y. Maeda;S. Yamauchi
中科院分区：
文献类型：
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作者：
M. Sakano;K. Koyama;H. Murakami;Y. Maeda;S. Yamauchi
从1993年到1999年，ASCA卫星在银河系中心周围的5×5°2区域进行了107次定点观测。在0.7-3keV或3-10keV波段的X射线图像中，我们发现了52个点源和12个漫射源。所有的点源均用吸收的幂函数模型进行了统一拟合。对于选定的亮源，SGR A*，AX J1745.6-2901，A1742-294，SLX1744-300，GRO J1744-28，SLX1737-282，GRS1734-292，AX J1749.2-2725，KS1741-293，GRS 1741.9-2853，以及一个不寻常的耀斑源XTE J1739-302，我们提供了更详细的光谱和时间分析，并讨论了它们的性质。十几个扩展的X射线源包括射电超新星残骸、巨型分子云和一些新发现。大多数显示的发射线要么来自高电离原子，要么来自低电离铁。用薄热模型或幂函数模型对X射线光谱进行了拟合。本文总结了这些结果，并给出了银河系中心区ASCA X射线源星表。
The ASCA satellite made 107 pointing observations on a 5 × 5 deg2 region around the center of our Galaxy from 1993 to 1999. In the X-ray images of the 0.7-3 keV or 3-10 keV bands, we found 52 point sources and a dozen diffuse sources. All the point sources are uniformly fitted with an absorbed power-law model. For selected bright sources, Sgr A*, AX J1745.6-2901, A1742-294, SLX 1744-300, GRO J1744-28, SLX 1737-282, GRS 1734-292, AX J1749.2-2725, KS 1741-293, GRS 1741.9-2853, and an unusual flare source XTE J1739-302, we present further detailed spectral and timing analyses and discuss their nature. The dozen extended X-ray sources comprise radio supernova remnants, giant molecular clouds, and some new discoveries. Most show emission lines from either highly ionized atoms or low-ionized irons. The X-ray spectra were fitted with either a thin thermal or power-law model. This paper summarizes the results and provides the ASCA X-ray source catalog in the Galactic center region.