论文标题
Chandra Swift-Bat选择的AGNS II的随访观察结果
Chandra Follow-up Observations of Swift-BAT-selected AGNs II
论文作者
论文摘要
我们介绍了九个低红移（z <= 0.10）的Chandra和Swift-BAT光谱分析，候选候选者掩盖了从Swift-Bat 150个月的目录中选择的积极活跃的银河核（AGN）。我们将柔软的（1-10 keV）X射线与这些蝙蝠源相交，并通过有力动机的模型适合其光谱。1-150KeV能量带中的光谱分析确定所有来源都遮盖了所有源，并具有90％的置信度，并具有一线圆柱密度NH> = 10^22 cm^-2。这些来源中有四个在NH> = 10^23 cm^-2中显示出显着的遮挡，另外两个来源是候选compton-thick-thick活跃的银河核（CT-AGNS），NH> = 10^24 cm^-2。这些两个来源，这些2Masx J020519994-0233055和IRAS 11055和IRAS 11058-11-11-11-11-11-11-11-11-11-11-11-11-11-11-11-11-11-11-11-1131-我们对蝙蝠源的软X射线随访的策略。在这里，我们介绍了到目前为止我们的方法的结果，并分析应用不同选择标准以发现本地宇宙中的CT-AGN的有效性。我们的选择标准的成功率〜20％的成功率，发现了严重遮盖的AGN，其CT性质通过随访的Nustar观察结果证实。这远高于盲目调查中发现的约5％。
We present the combined Chandra and Swift-BAT spectral analysis of nine low-redshift (z <= 0.10), candidate heavily obscured active galactic nuclei (AGN) selected from the Swift-BAT 150-month catalog. We located soft (1-10 keV) X-ray counterparts to these BAT sources and joint fit their spectra with physically motivated models.The spectral analysis in the 1-150 keV energy band determined that all sources are obscured, with a line-of-sight column density NH >= 10^22 cm^-2 at a 90% confidence level. Four of these sources show significant obscuration with NH >= 10^23 cm^-2 and two additional sources are candidate Compton-thick Active Galactic Nuclei (CT-AGNs) with NH >= 10^24 cm^-2.These two sources, 2MASX J02051994-0233055 and IRAS 11058-1131, are the latest addition to the previous 3 CT-AGN candidates found using our strategy for soft X-ray follow-up of BAT sources. In here we present the results of our methodology so far, and analyze the effectiveness of applying different selection criteria to discover CT-AGN in the local Universe. Our selection criteria has a ~20% success rate of discovering heavily obscured AGN whose CT nature is confirmed by follow-up NuSTAR observations. This is much higher than the ~5% found in blind surveys.
