NAOC Open IR
X-Ray Intraday Variability of the TeV Blazar PKS 2155-304 with Suzaku during 2005-2014
Zhang, Zhongli1,2; Gupta, Alok C.3,4; Gaur, Haritma4; Wiita, Paul J.5; An, Tao1,2; Lu, Yang1; Fan, Shida6; Xu, Haiguang6,7
2021-03-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume909Issue:2Pages:13
AbstractWe have examined 13 pointed observations of the TeV-emitting high synchrotron peak blazar PKS 2155-304, taken by the Suzaku satellite throughout its operational period. We found that the blazar showed large-amplitude intraday variabilities in the soft (0.8-1.5 keV) and the hard (1.5-8.0 keV) bands in the light curves. Spectral variability on intraday timescales is estimated using the hardness ratio. The blazar usually becomes harder when brighter and vice versa, following the typical behavior of high synchrotron peak blazars. The power spectral density analyses of 11 out of 13 light curves in the total energy (0.8-8.0 keV) are found to be dominated by red noise, with power-law spectral indices that span a large range, from -2.81 to -0.88. Discrete correlation function analyses of all the 13 light curves between the soft and the hard bands show that they are well correlated and peak at, or very close to, zero lag. This indicates that the emissions in soft and hard bands are probably cospatial and emitted from the same population of leptons. Considering fluxes versus variability timescales, we found no correlation on intraday timescales, implying that X-ray emission from PKS 2155-304 is not dominated by simple changes in the Doppler factor. We briefly discuss the most likely emission mechanisms responsible for the observed flux and spectral variabilities and place constraints on magnetic field strength and Lorentz factors of the electrons emitting the X-rays in the most likely scenario.
KeywordBlazars Timing variation methods X-ray astronomy
Funding OrganizationNational Key R&D Programme of China ; National Key R&D Programme of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) ; Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) ; Department of Science & Technology (DST), Government of India through the INSPIRE faculty award at ARIES, Nainital, India ; Department of Science & Technology (DST), Government of India through the INSPIRE faculty award at ARIES, Nainital, India ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; National Science Foundation of China ; National Science Foundation of China ; National Key R&D Programme of China ; National Key R&D Programme of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) ; Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) ; Department of Science & Technology (DST), Government of India through the INSPIRE faculty award at ARIES, Nainital, India ; Department of Science & Technology (DST), Government of India through the INSPIRE faculty award at ARIES, Nainital, India ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; National Science Foundation of China ; National Science Foundation of China ; National Key R&D Programme of China ; National Key R&D Programme of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) ; Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) ; Department of Science & Technology (DST), Government of India through the INSPIRE faculty award at ARIES, Nainital, India ; Department of Science & Technology (DST), Government of India through the INSPIRE faculty award at ARIES, Nainital, India ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; National Science Foundation of China ; National Science Foundation of China ; National Key R&D Programme of China ; National Key R&D Programme of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) ; Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) ; Department of Science & Technology (DST), Government of India through the INSPIRE faculty award at ARIES, Nainital, India ; Department of Science & Technology (DST), Government of India through the INSPIRE faculty award at ARIES, Nainital, India ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; National Science Foundation of China ; National Science Foundation of China
DOI10.3847/1538-4357/abdd38
Language英语
Funding ProjectNational Key R&D Programme of China[2018YFA0404602] ; National Key R&D Programme of China[2018YFA0404603] ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI)[2016VMB073] ; Department of Science & Technology (DST), Government of India through the INSPIRE faculty award at ARIES, Nainital, India[IFA17-PH197] ; Ministry of Science and Technology of China[2018YFA0404601] ; National Science Foundation of China[11621303] ; National Science Foundation of China[11835009] ; National Science Foundation of China[11973033]
Funding OrganizationNational Key R&D Programme of China ; National Key R&D Programme of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) ; Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) ; Department of Science & Technology (DST), Government of India through the INSPIRE faculty award at ARIES, Nainital, India ; Department of Science & Technology (DST), Government of India through the INSPIRE faculty award at ARIES, Nainital, India ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; National Science Foundation of China ; National Science Foundation of China ; National Key R&D Programme of China ; National Key R&D Programme of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) ; Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) ; Department of Science & Technology (DST), Government of India through the INSPIRE faculty award at ARIES, Nainital, India ; Department of Science & Technology (DST), Government of India through the INSPIRE faculty award at ARIES, Nainital, India ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; National Science Foundation of China ; National Science Foundation of China ; National Key R&D Programme of China ; National Key R&D Programme of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) ; Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) ; Department of Science & Technology (DST), Government of India through the INSPIRE faculty award at ARIES, Nainital, India ; Department of Science & Technology (DST), Government of India through the INSPIRE faculty award at ARIES, Nainital, India ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; National Science Foundation of China ; National Science Foundation of China ; National Key R&D Programme of China ; National Key R&D Programme of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) ; Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) ; Department of Science & Technology (DST), Government of India through the INSPIRE faculty award at ARIES, Nainital, India ; Department of Science & Technology (DST), Government of India through the INSPIRE faculty award at ARIES, Nainital, India ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; National Science Foundation of China ; National Science Foundation of China
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000627291800001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/79463
Collection中国科学院国家天文台
Corresponding AuthorZhang, Zhongli
Affiliation1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China
3.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
4.Aryabhatta Res Inst Observat Sci ARIES, Manora Peak, Manora Peak 263001, Nainital, India
5.Coll New Jersey, Dept Phys, 2000 Pennington Rd, Ewing, NJ 08628 USA
6.Shanghai Jiao Tong Univ, Sch Phys & Astron, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
7.Shanghai Jiao Tong Univ, IFSA Collaborat Innovat Ctr, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Zhongli,Gupta, Alok C.,Gaur, Haritma,et al. X-Ray Intraday Variability of the TeV Blazar PKS 2155-304 with Suzaku during 2005-2014[J]. ASTROPHYSICAL JOURNAL,2021,909(2):13.
APA Zhang, Zhongli.,Gupta, Alok C..,Gaur, Haritma.,Wiita, Paul J..,An, Tao.,...&Xu, Haiguang.(2021).X-Ray Intraday Variability of the TeV Blazar PKS 2155-304 with Suzaku during 2005-2014.ASTROPHYSICAL JOURNAL,909(2),13.
MLA Zhang, Zhongli,et al."X-Ray Intraday Variability of the TeV Blazar PKS 2155-304 with Suzaku during 2005-2014".ASTROPHYSICAL JOURNAL 909.2(2021):13.
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