通过光谱学揭示未识别的INTEGRAL源的性质：综述
Revealing the nature of unidentified INTEGRAL sources through optical spectroscopy: an overview
摘要：
由于INTEGRAL卫星，观察20 keV以上硬X射线天空的方式发生了重大变化。通过构成INTEGRAL调查基础的IBIS仪器独特的成像和光谱能力，该卫星在灵敏度和位置准确性方面改进了对硬X射线源的了解。然而，属于这些调查的许多来源的性质尚未确定，但结合使用较长波长（主要是软X射线和无线电）的现有信息，尤其是对这些硬X射线物体的假定对应物的光谱学，可以揭示它们的确切性质。自2004年以来，我们的小组确定了100多个完整的来源，大大减少了各种IBIS调查中未识别物体的百分比，并允许对它们进行统计研究。在这里，我们提出了一个总结的鉴定工作和我们的初步结果，属于第四IBIS目录中的新发现的来源鉴定的展望。
英文摘要：
Thanks to the INTEGRAL satellite the way of looking at the hard X-ray sky above 20 keV has changed substantially. Through the unique imaging and spectroscopy capabilities of the IBIS instrument that has formed the basis of the INTEGRAL surveys, this satellite has improved the knowledge on hard X-ray sources in terms of sensitivity and positional accuracy. Many of the sources belonging to these surveys are however of unidentified nature, but the combined use of available information at longer wavelengths (mainly soft X-rays and radio) and above all optical spectroscopy on the putative counterparts of these hard X-ray objects can reveal their exact nature. Since 2004 our group identified more than 100 it INTEGRAL sources, reducing drastically the percentage of unidentified objects in the various IBIS surveys and allowing statistical studies on them. Here we present a summary of this identification work and an outlook of our preliminary results on identification of newly-discovered sources belonging to the 4th IBIS catalog.
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