arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0906.2909astro-ph.COastro-ph.HE
收藏

1型AGN的INTEGRAL完整样品

The INTEGRAL Complete Sample of Type 1 AGN

M. Molina, L. Bassani, A. Malizia, J. B. Stephen, A. J. Bird, A. J. Dean, F. Panessa, A. De Rosa, R. Landi

摘要:

本文讨论了INTEGRAL在5.5 σ以上20-40 keV波段探测到的36个完整的Ⅰ型活动星系核样品的宽波段X射线特征。我们目前,对于所有的对象在样本中,宽带(1-110千电子伏)光谱分析,通过使用INTEGRAL/Swift-BAT观测与XMM-牛顿,钱德拉,ASCA和Swift/XRT数据。我们还提出了样品的一般平均性质,即光子指数的分布,高能量截止,反射分数和吸收特性,以及对其参数空间的深入分析。我们发现,平均塞弗特1幂律的指数为1.7,分散度为0.2。平均截止能量约为100 keV,大多数天体显示的Ec在50-150 keV范围内;康普顿反射的平均量为1.5,典型色散为0.7。我们没有发现任何令人信服的各种参数之间的相关性,这表明我们的分析并不强烈依赖于它们之间的相互作用。最后,我们调查如何在这项工作中提出的结果适合目前的框架AGN光谱建模和宇宙漫射X射线背景合成模型。

英文摘要:

In this paper we discuss the broad-band X-ray characteristics of a complete sample of 36 type 1 AGN, detected by INTEGRAL in the 20-40 keV band above the 5.5sigma level. We present, for all the objects in the sample, the broad-band (1-110 keV) spectral analysis obtained by using INTEGRAL/Swift-BAT observations together with XMM-Newton, Chandra, ASCA and Swift/XRT data. We also present the general average properties of the sample, i.e. the distribution of photon indices, high energy cut-offs, reflection fractions and absorption properties, together with an in-depth analysis of their parameter space. We find that the average Seyfert 1 power law has an index of 1.7 with a dispersion of 0.2. The mean cut-off energy is at around 100 keV, with most objects displaying Ec in the range 50-150 keV; the average amount of Compton reflection is 1.5 with a typical dispersion of 0.7. We do not find any convincing correlation between the various parameters, an indication that our analysis is not strongly dependent by the interplay between them. Finally, we investigate how the results presented in this work fit into current frameworks for AGN spectral modeling and Cosmic Diffuse X-ray Background synthesis models.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑