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Exploring High-ener...
Exploring High-energy Emission from the BL Lacertae Object S5 0716+714 with the Fermi Large Area Telescope
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- Geng, Xiongfei (author)
- Yunnan Univ, Sch Phys & Astron, Kunming 650091, Yunnan, Peoples R China.;Key Lab Astroparticle Phys, Kunming 650091, Yunnan, Peoples R China.
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- Zeng, Wei (author)
- Yunnan Univ, Sch Phys & Astron, Kunming 650091, Yunnan, Peoples R China.;Key Lab Astroparticle Phys, Kunming 650091, Yunnan, Peoples R China.
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- Rani, Bindu (author)
- NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
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- Britto, Richard J. (author)
- Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa.
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- Zhang, Guomei (author)
- Yunnan Univ, Sch Phys & Astron, Kunming 650091, Yunnan, Peoples R China.;Key Lab Astroparticle Phys, Kunming 650091, Yunnan, Peoples R China.
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- Wen, Tao (author)
- Yunnan Univ, Sch Phys & Astron, Kunming 650091, Yunnan, Peoples R China.;Key Lab Astroparticle Phys, Kunming 650091, Yunnan, Peoples R China.
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- Hu, Wen (author)
- Jinggangshan Univ, Sch Math Sci & Phys, Jian 343009, Jiangxi, Peoples R China.
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- Larsson, Stefan (author)
- Högskolan Dalarna,KTH,Partikel- och astropartikelfysik,Albanova VinnExcellence Center for Protein Technology, ProNova,Oskar Klein Ctr Cosmoparticle Phys, SE-10691 Stockholm, Sweden.;Dalarna Univ, Sch Educ Hlth & Social Studies, Nat Sci, SE-79188 Falun, Sweden.,Naturvetenskap,Department of Physics, KTH Royal Institute of Technology;Oskar Klein Centre for Cosmoparticle Physics, AlbaNova, Stockholm
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- Thompson, D. J. (author)
- NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
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- Yang, Shenbang (author)
- Yunnan Univ, Sch Phys & Astron, Kunming 650091, Yunnan, Peoples R China.;Key Lab Astroparticle Phys, Kunming 650091, Yunnan, Peoples R China.
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- Cao, Gang (author)
- Yunnan Univ Finance & Econ, Dept Math, Kunming 650221, Yunnan, Peoples R China.
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- Dai, Benzhong (author)
- Yunnan Univ, Sch Phys & Astron, Kunming 650091, Yunnan, Peoples R China.;Key Lab Astroparticle Phys, Kunming 650091, Yunnan, Peoples R China.
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Yunnan Univ, Sch Phys & Astron, Kunming 650091, Yunnan, Peoples R China;Key Lab Astroparticle Phys, Kunming 650091, Yunnan, Peoples R China. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. (creator_code:org_t)
- 2020-11-20
- 2020
- English.
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In: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 904:1
- Related links:
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https://doi.org/10.3...
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https://doi.org/10.3...
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https://du.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.3...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- We present the results of an extensive gamma-ray data analysis of the emission from the blazar S5 0716+714 with the primary motivation to study its temporal and spectral variability behavior. In this work, we extract a 10 days binned gamma-ray light curve from 2008 August 4 to 2016 April 27 in the energy range of 0.1-300 GeV and identify six outburst periods with peak flux of >4 x 10(-7) ph cm(-2) s(-1) from this highly variable source. The brightest flares are identified by zooming in these outburst periods to 1 day binning and using the Bayesian Blocks algorithm. The fastest variability timescale is found to be 1.5 0.3 hr at MJD 57128.01 0.01 with a peak flux above 100 MeV of (26.8 6.9) x 10(-7) ph cm(-2) s(-1). No hint of periodic modulations has been detected for the light curve of S5 0716+714. During the outburst phases, the gamma-ray spectrum shows an obvious spectral break with a break energy between 0.93 and 6.90 GeV energies, which may be caused by an intrinsic break in the energy distribution of radiating particles. The five highest-energy photons, with E > 100 GeV, imply that the high-energy emission from this source may originate from a moving emission region in a helical path upstream in the jet. The spectral behavior and temporal characteristics of the individual flares indicate that the location of the emission region lies in the sub-parsec scale (r(gamma) < 0.85 pc).
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- Blazars
- BL Lacertae objects
- Relativistic jets
- Utbildning och lärande
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Geng, Xiongfei
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Zeng, Wei
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Rani, Bindu
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Britto, Richard ...
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Zhang, Guomei
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Wen, Tao
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show more...
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Hu, Wen
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Larsson, Stefan
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Thompson, D. J.
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Yang, Shenbang
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Cao, Gang
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Dai, Benzhong
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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Astrophysical Jo ...
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Royal Institute of Technology
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Högskolan Dalarna