The Second Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope

The Second Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
复制标题

DOI：
10.1088/0004-637x/743/2/171
复制
发表时间：
2011-08
期刊：
--
影响因子：
--
通讯作者：
The Fermi-LAT Collaboration
The Fermi-LAT Collaboration
中科院分区：
其他
文献类型：
--
作者：
The Fermi-LAT Collaboration

文献摘要

被引文献

相似文献

介绍了费米大面积望远镜（LAT）在近两年的科学工作中探测到的第二份活动星系核目录。第二LAT AGN目录（2LAC）包括1017个位于银河系高纬度（|b| > 10）的γ射线源，这些γ射线源的检验统计量（TS）大于25，与AGN有统计学关联。然而，其中一些受到分析问题的影响，有些与多个agn相关。因此，我们定义了一个干净的样本，其中包括886个agn，其中包括395个BL花边天体（BL Lacs）， 310个平谱射电类星体（FSRQs）， 157个未知类型的候选blazar（即具有宽带blazar特征但尚未进行光谱测量），8个失调的agn， 4个窄线Seyfert 1 (nls1)， 10个其他类型的agn和2个星暴星系。在可能的情况下，根据档案无线电、光学和x射线数据允许的光谱能量分布（SEDs），对耀变体进行了进一步分类。而几乎所有的fsrq都有一个同步辐射峰值频率1015hz。与第一个LAT AGN目录（1LAC）相比，2LAC有了显著的改进，相关资源增加了52%。对新探测到的源的全面描述将需要更多的宽带数据。提出并讨论了不同类型耀变体的各种特性，如γ射线通量和光子幂律光谱指数、红移、γ射线光度、变异性和档案射电光度，以及它们之间的相关性。在1LAC观察到的一般趋势得到证实。主题标题：伽马射线；观测-星系；活动-星系；喷流-星系座BL天体；布鲁克，A-6020因斯布鲁克，奥地利马克斯普朗克研究所，r Kernphysik， D-69029海德堡，德国空间科学部，NASA艾姆斯研究中心，莫菲特场，CA 94035-1000，美国NYCB实时计算公司，Lattingtown, NY 11560-1025，美国普度大学化学与物理系，Calumet，哈蒙德，IN 46323-2094，美国日地环境实验室，名古屋大学，名古屋464-8601，日本Institució Catalana de Recerca i eststudis avanats (ICREA)，巴塞罗那，西班牙国家航空航天局博士后项目研究员，美国国际航天大学联盟（CIFS）， I-10133都灵，意大利，罗马大学，I-00133罗马，意大利实践公司，亚历山大，VA 22303，常驻海军研究实验室，华盛顿特区20375
The second catalog of active galactic nuclei (AGNs) detected by the Fermi Large Area Telescope (LAT) in two years of scientific operation is presented. The Second LAT AGN Catalog (2LAC) includes 1017 γ-ray sources located at high Galactic latitudes (|b| > 10) that are detected with a test statistic (TS) greater than 25 and associated statistically with AGNs. However some of these are affected by analysis issues and some are associated with multiple AGNs. Consequently we define a clean sample which includes 886 AGNs, comprising 395 BL Lacertae objects (BL Lacs), 310 flat-spectrum radio quasars (FSRQs), 157 candidate blazars of unknown type (i.e., with broad-band blazar characteristics but with no optical spectral measurement yet), eight misaligned AGNs, four narrow-line Seyfert 1 (NLS1s), 10 AGNs of other types and two starburst galaxies. Where possible, the blazars have been further classified based on their spectral energy distributions (SEDs) as archival radio, optical, and X-ray data permit. While almost all FSRQs have a synchrotron-peak frequency 1015 Hz. The 2LAC represents a significant improvement relative to the First LAT AGN Catalog (1LAC), with 52% more associated sources. The full characterization of the newly detected sources will require more broad-band data. Various properties, such as γ-ray fluxes and photon power law spectral indices, redshifts, γ-ray luminosities, variability, and archival radio luminosities—and their correlations are presented and discussed for the different blazar classes. The general trends observed in 1LAC are confirmed. Subject headings: gamma rays: observations — galaxies: active — galaxies: jets — BL Lacertae objects: general bruck, A-6020 Innsbruck, Austria Max-Planck-Institut für Kernphysik, D-69029 Heidelberg, Germany Space Sciences Division, NASA Ames Research Center, Moffett Field, CA 94035-1000, USA NYCB Real-Time Computing Inc., Lattingtown, NY 11560-1025, USA Department of Chemistry and Physics, Purdue University Calumet, Hammond, IN 46323-2094, USA Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya 464-8601, Japan Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain NASA Postdoctoral Program Fellow, USA Consorzio Interuniversitario per la Fisica Spaziale (CIFS), I-10133 Torino, Italy Dipartimento di Fisica, Università di Roma “Tor Vergata”, I-00133 Roma, Italy Praxis Inc., Alexandria, VA 22303, resident at Naval Research Laboratory, Washington, DC 20375