论文标题
外乳外硬X射线天空的多频表征
A multifrequency characterization of the extragalactic hard X-ray sky
论文作者
论文摘要
如今，我们知道宇宙X射线背景（CXB）的起源是由于附近活性银河核的整合发射所致。因此，为了获得对不同源类别对CXB的贡献的精确估计，对于充分表征硬X射线天空至关重要。 We present a multifrequency analysis of all sources listed in the 3d release of the Palermo Swift-BAT hard X-ray catalog (3PBC) with the goal of (i) identifying and classifying the largest number of sources adopting multifrequency criteria, with particular emphasis on extragalactic populations and (ii) extracting Seyfert galaxies to present here the 2nd release of the Turin-SyCAT catalog.我们概述了基于无线电，红外和光学标准的分类方案，该方案使我们能够区分未识别和未分类的硬X射线源，并对剩余的X射线源进行分类和分类。我们的3pbc的修订版列出了1176个分类，820个外层面和356个银河系，199个未分类和218个身份不明的来源。根据我们的分析，坚硬的X射线天空主要由Seyfert星系和Blazars组成。对于Seyfert星系，我们介绍了都灵同伴的第二版，其中包括总共633个Seyfert星系，并具有282个新来源，这比上一个版本的增量为80％。我们证实，在1型Seyfert星系和2型的红外X射线通量比的通量分布之间没有明显的差异。但是，我们证实了MID-IR通量与硬X射线通量之间的显着趋势。
Nowadays we know that the origin of the Cosmic X-ray Background (CXB) is due to the integrated emission of nearby active galactic nuclei. Thus, to obtain a precise estimate of the contribution of different source classes to the CXB it is crucial to fully characterize the hard X-ray sky. We present a multifrequency analysis of all sources listed in the 3d release of the Palermo Swift-BAT hard X-ray catalog (3PBC) with the goal of (i) identifying and classifying the largest number of sources adopting multifrequency criteria, with particular emphasis on extragalactic populations and (ii) extracting Seyfert galaxies to present here the 2nd release of the Turin-SyCAT catalog. We outline a classification scheme based on radio, infrared and optical criteria that allows us to distinguish between unidentified and unclassified hard X-ray sources, and classify and classify the remaining ones discriminating between Galactic and extragalactic classes. Our revised version of the 3PBC lists 1176 classified, 820 extragalactic, and 356 Galactic, 199 unclassified, and 218 unidentified sources. According to our analysis, the hard X-ray sky is mainly populated by Seyfert galaxies and blazars. For the Seyfert galaxies, we present the 2nd release of the Turin-SyCAT including a total of 633 Seyfert galaxies, with 282 new sources, which is an 80% increment from the previous release. We confirm, that there is no clear difference between the flux distribution of the infrared-to-hard X-ray flux ratio of Seyfert galaxies Type 1 and Type 2. However, we confirm a significant trend between the mid-IR flux and hard X-ray flux.
