Identifying Three New AGNs among Fermi Unidentified Gigaelectronvolt Sources

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外文摘要：We report our identification of three gigaelectronvolt γ-ray sources,4FGL J0502.6+0036,4FGL J1055.9+6507,and 4FGL J1708.2+5519,as Active Galactic Nuclei(AGNs).They are listed in the latest Fermi-Large Area Telescope source catalog as unidentified ones.We find that the sources all showed γ-ray flux variations in recent years.Using different survey catalogs,we are able to find a radio source within the error circle of each source's position.Further analysis of optical sources in the fields allows us to determine the optical counterparts,which showed similar variation patterns to those seen in γ-rays.The optical counterparts have reported redshifts of 0.6,1.5,and 2.3,respectively,estimated from photometric measurements.In addition,we also obtain an X-ray spectrum of 4FGL J0502.6+0036 and a flux upper limit on the X-ray emission of 4FGL J1055.9+6507 by analyzing the archival data.The broadband spectral energy distributions of the three sources from radio to γ-rays are constructed.Comparing mainly the γ-ray properties of the three sources with those of different sub-classes of AGNs,we tentatively identify them as blazars.Followup optical spectroscopy is highly warranted for obtaining their spectral features and thus verifying the identification.

外文关键词：

gamma-rays:galaxies(galaxies:)BL Lacertae objects:general(galaxies:)quasars:general

作者：

Shun-Hao Ji、Zhong-Xiang Wang、Qiang-Meng Huang、Ruo-Heng Yang

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作者单位：

Department of Astronomy,School of Physics and Astronomy,Yunnan University,Kunming 650091,China

Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China

基金：

Zwicky Transient Facility projectNational Science FoundationCaltech,IPAC,the Weizmann Institute for ScienceOskar Klein Center at Stockholm UniversityUniversity of Maryland,Deutsches Elektronen-Synchrotron and Humboldt UniversityTANGO Consortium of Taiwan,ChinaUniversity of Wisconsin at Milwaukee,Trinity College Dublin,Lawrence Livermore National LaboratoriesIN2P3,Francejoint project of the Jet Propulsion Laboratory/California Institute of Technology and the University of ArizonaNational Aeronautics and Space AdministrationNational Aeronautics and Space AdministrationCalifornia Institute of TechnologyAustralian Government with support from the National Collaborative Research Infrastructure StrategyBasic Research Program of Yunnan ProvinceNational Natural Science Foundation of China(NSFC)Original Innovation Program of the Chinese Academy of Sciencesscience research program for graduate students of Yunnan University

项目编号：

AST-2034437202201AS07000512273033E085021002KC-23234629

出版年：

2024

DOI：

10.1088/1674-4527/ad5ada

天文和天体物理学研究

中国科学院国家天文台

天文和天体物理学研究

CSTPCD

影响因子：0.406

ISSN：1674-4527

年,卷(期)：2024.24(7)