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The Complex VHE And Multiwavelength Flaring Activity Of The FSRQ PKS 1510-089 In May 2015
Heidelberg Univ, Germany ; North West Univ, South Africa.
North West Univ, South Africa.
Max Planck Inst Kernphys, Germany.
Heidelberg Univ, Germany.
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2017 (English)In: HIGH ENERGY GAMMA-RAY ASTRONOMY / [ed] Aharonian, FA Hofmann, W Rieger, FM, American Institute of Physics (AIP), 2017, UNSP 050023Conference paper, Published paper (Refereed)
Abstract [en]

The blazar PKS 1510-089 was the first of the flat spectrum radio quasar type, which had been detected simultaneously by a ground based Cherenkov telescope (H.E.S.S.) and the LAT instrument on board the Fermi satellite. Given the strong broad line region emission defining this blazar class, and the resulting high optical depth for VHE (E > 100 GeV) gamma-rays, it was surprising to detect VHE emission from such an object. In May 2015, PKS 1510-089 exhibited high states throughout the electromagnetic spectrum. Target of Opportunity observations with the H.E.S.S. experiment revealed strong and unprecedented variability of this source. Comparison with the lightcurves obtained with the Fermi-LAT in HE gamma-rays (100 MeV < E < 100 GeV) and ATOM in the optical band shows a complex relationship between these energy bands. This points to a complex structure of the emission region, since the one-zone model has difficulties to reproduce the source behavior even when taking into account absorption by ambient soft photon fields. It will be shown that the presented results have important consequences for the explanation of FSRQ spectra and lightcurves, since the emission region cannot be located deep inside the broad line region as is typically assumed. Additionally, acceleration and cooling processes must be strongly time-dependent in order to account for the observed variability patterns.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2017. UNSP 050023
Series
AIP Conference Proceedings, ISSN 0094-243X ; 1792
National Category
Astronomy, Astrophysics and Cosmology
Research subject
Physics, Astroparticle Physics
Identifiers
URN: urn:nbn:se:lnu:diva-64364DOI: 10.1063/1.4968969ISI: 000399207800084ISBN: 978-0-7354-1456-3 (print)OAI: oai:DiVA.org:lnu-64364DiVA: diva2:1098458
Conference
6th International Meeting on High Energy Gamma-Ray Astronomy, JUL 11-15, 2016, Heidelberg, GERMANY
Available from: 2017-05-24 Created: 2017-05-24 Last updated: 2017-05-24Bibliographically approved

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CiteExportLink to record
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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
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More styles
Language
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