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Multi-wavelength observations of the BL Lac object FermiJ1544-0649: One year after its awakening
Tam, P. H. T.1; Pal, P. S.1; Cui, Y. D.1; Jiang, N.2; Sotnikova, Y.3; Yang, C. W.2,4; Wang, L. Z.5; Tang, B. T.1; Li YB(李宇斌)6,7,8; Mao JR(毛基荣)6,7,9; Kong, A. K. H.10; Zhong, Z. H.2; Ding, J.11; Mufakharov, T.12,13; Fan, J. F.14; Dou, L. M.14; Shen, R. F.1; Ai, Y. L.1
Corresponding AuthorTam, P. H. T.(tanbxuan@sysu.edu.cn)
Source PublicationJOURNAL OF HIGH ENERGY ASTROPHYSICS
2020-06-01
Volume26Pages:45-57
DOI10.1016/j.jheap.2020.02.004
Contribution Rank第6完成单位
Indexed BySCI
KeywordGalaxies BL Lacertae objects: General Radiation mechanisms: Non-thermal Surveys
Abstract

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.

Funding ProjectNational 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
Funding OrganizationNational 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
Language英语
Subject Area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
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherELSEVIER
Publication PlaceRADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS
ISSN2214-4048
URL查看原文
WOS IDWOS:000539289100004
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordHUBBLE-SPACE-TELESCOPE ; BROAD ABSORPTION-LINE ; SYNCHROTRON EMISSION ; RAY-SPECTRA ; M87 JET ; GALAXIES ; FIELD ; VIEW ; SKY
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/23460
Collection丽江天文观测站(南方基地)
Corresponding AuthorTam, P. H. T.
Affiliation1.School of Physics and Astronomy, Sun Yat-sen University, Guangzhou 510275, People's Republic of China
2.CAS Key Laboratory for Researches in Galaxies and Cosmology, University of Sciences and Technology of China, Hefei, Anhui 230026, People's Republic of China
3.Special Astrophysical Observatory, Russian Academy of Sciences, 369167, Nizhnij Arkhyz, Russian Federation
4.Polar Research Institute of China, 451 Jinqiao Road, Shanghai 200136, People's Republic of China
5.Chinese Academy of Sciences South America Center for Astronomy, China-Chile Joint Center for Astronomy, Camino El Observatorio #1515, Las Condes, Santiago, Chile
6.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
7.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China
8.University of Chinese Academy of Sciences, Beijing 100049, 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.Institute of Astronomy, National Tsing Hua University 101, Section 2. Kuang-Fu Road, Hsinchu, 30013, Taiwan, ROC
11.Department of Astronomy & Astrophysics, University of California Santa Cruz, 1156 High Street, Santa Cruz, CA 95060, USA
12.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, People's Republic of China
13.Kazan Federal University, 18 Kremlyovskaya St., Kazan 420008, Russian Federation
14.Center for Astrophysics, Guangzhou University, Guangzhou 510006, People's Republic of China
Recommended Citation
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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