Multi-wavelength observations of the BL Lac object FermiJ1544-0649: One year after its awakening | |
Tam, P. H. T.13; Pal, P. S.13; Cui, Y. D.13; Jiang, N.11; Sotnikova, Y.12; Yang, C. W.1,11; Wang, L. Z.14; Tang, B. T.13; Li YB(李宇斌)7,8,10; Mao JR(毛基荣)7,8,9 | |
刊名 | JOURNAL OF HIGH ENERGY ASTROPHYSICS |
2020-06-01 | |
卷号 | 26页码:45-57 |
关键词 | Galaxies BL Lacertae objects: General Radiation mechanisms: Non-thermal Surveys |
ISSN号 | 2214-4048 |
DOI | 10.1016/j.jheap.2020.02.004 |
通讯作者 | Tam, P. H. T.(tanbxuan@sysu.edu.cn) |
产权排序 | 第6完成单位 |
文献子类 | Article |
英文摘要 | We report observations of a transient source FermiJ1544-0649 from radio to gamma-rays. FermiJ1544-0649 was discovered by the Fermi-LAT in May 2017. Follow-up Swift-XRT observations revealed three flaring episodes through March 2018, and the peak X-ray flux is about 10(3) higher than the ROSAT all-sky survey (RASS) flux upper limit. Optical spectral measurements taken by the Magellan 6.5-m telescope and the Lick-Shane telescope both show a largely featureless spectrum, strengthening the BL Lac interpretation first proposed by Bruni et al. (2018). The optical and mid-infrared (MIR) emission goes to a higher state in 2018, when the flux in high energies goes down to a lower level. Our RATAN-600 m measurements at 4.8 GHz and 8.2 GHz do not indicate any significant radio flux variation over the monitoring seasons in 2017 and 2018, nor deviate from the archival NVSS flux level. During GeV flaring times, the spectrum is very hard (Gamma(gamma) similar to 1.7) in the GeV band and at times also very hard ((Gamma(X) less than or similar to 2) in the X-rays, similar to a high-synchrotron-peak (or even an extreme) BL Lac object, making FermiJ1544-0649 a good target for ground-based Cherenkov telescopes. (C) 2020 Elsevier B.V. All rights reserved. |
学科主题 | 天文学 ; 天体物理学 ; 高能天体物理学 ; 实测天体物理学 ; 星系与宇宙学 ; 星系天文学 |
URL标识 | 查看原文 |
出版地 | RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS |
资助项目 | National Science Foundation of China (NSFC)[11633007] ; National Science Foundation of China (NSFC)[11661161010] ; National Science Foundation of China (NSFC)[U1731136] ; NSFC[11833007] ; NSFC[11421303] ; NSFC[11673062] ; NSFC[11733001] ; NSFC[U1531245] ; Hundred Talent Program of Chinese Academy of Sciences ; Major Program of Chinese Academy of Sciences[KJZD-EW-M06] ; Oversea Talent Program of Yunnan Province ; Chinese Academy of Sciences (CAS) ; Planetary Science Division of NASA ; ESA Member States ; NASA |
WOS关键词 | HUBBLE-SPACE-TELESCOPE ; BROAD ABSORPTION-LINE ; SYNCHROTRON EMISSION ; RAY-SPECTRA ; M87 JET ; GALAXIES ; FIELD ; VIEW ; SKY |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | ELSEVIER |
WOS记录号 | WOS:000539289100004 |
资助机构 | National Science Foundation of China (NSFC) ; NSFC ; Hundred Talent Program of Chinese Academy of Sciences ; Major Program of Chinese Academy of Sciences ; Oversea Talent Program of Yunnan Province ; Chinese Academy of Sciences (CAS) ; Planetary Science Division of NASA ; ESA Member States ; NASA |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/23459] |
专题 | 云南天文台_丽江天文观测站(南方基地) |
通讯作者 | Tam, P. H. T. |
作者单位 | 1.Polar Research Institute of China, 451 Jinqiao Road, Shanghai 200136, People's Republic of China 2.Center for Astrophysics, Guangzhou University, Guangzhou 510006, People's Republic of China 3.Kazan Federal University, 18 Kremlyovskaya St., Kazan 420008, Russian Federation 4.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, People's Republic of China 5.Department of Astronomy & Astrophysics, University of California Santa Cruz, 1156 High Street, Santa Cruz, CA 95060, USA 6.Institute of Astronomy, National Tsing Hua University 101, Section 2. Kuang-Fu Road, Hsinchu, 30013, Taiwan, ROC 7.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China 8.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People's Republic of China 9.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, People's Republic of China 10.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China |
推荐引用方式 GB/T 7714 | Tam, P. H. T.,Pal, P. S.,Cui, Y. D.,et al. Multi-wavelength observations of the BL Lac object FermiJ1544-0649: One year after its awakening[J]. JOURNAL OF HIGH ENERGY ASTROPHYSICS,2020,26:45-57. |
APA | Tam, P. H. T..,Pal, P. S..,Cui, Y. D..,Jiang, N..,Sotnikova, Y..,...&Ai, Y. L..(2020).Multi-wavelength observations of the BL Lac object FermiJ1544-0649: One year after its awakening.JOURNAL OF HIGH ENERGY ASTROPHYSICS,26,45-57. |
MLA | Tam, P. H. T.,et al."Multi-wavelength observations of the BL Lac object FermiJ1544-0649: One year after its awakening".JOURNAL OF HIGH ENERGY ASTROPHYSICS 26(2020):45-57. |
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