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A search for pair haloes around active galactic nuclei through a temporal analysis of Fermi-Large Area Telescope data
Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.ORCID iD: 0000-0001-6511-4330
Academia Sinica Institute of Astronomy and Astrophysics, Taiwan ; Yonsei University, Korea.
2016 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 457, no 3, 2433-2444 p.Article in journal (Refereed) Published
Abstract [en]

We develop a method to search for pair haloes around active galactic nuclei (AGN) through a temporal analysis of γ-ray data. The basis of our method is an analysis of the spatial distributions of photons coming from AGN flares and from AGN quiescent states and a further comparison of these two spatial distributions. This method can also be used for a reconstruction of a point spread function (PSF). We found no evidence for a pair halo component through this method by applying it to the Fermi-Large Area Telescope (LAT) data in the energy bands of 4.5–6, 6–10, and >10 GeV and set upper limits on the fraction of photons attributable to a pair halo component. An illustration of how to reconstruct the PSF ofFermi-LAT is given. We demonstrate that the PSF reconstructed by using this method is in good agreement with that which was obtained by using the γ-ray data taken by LAT in the direction of the Crab pulsar and nebula.

Place, publisher, year, edition, pages
2016. Vol. 457, no 3, 2433-2444 p.
National Category
Astronomy, Astrophysics and Cosmology
Research subject
Physics, Astroparticle Physics
Identifiers
URN: urn:nbn:se:lnu:diva-50908DOI: 10.1093/mnras/stw056ISI: 000373583900013Scopus ID: 2-s2.0-84976869033OAI: oai:DiVA.org:lnu-50908DiVA: diva2:912673
Available from: 2016-03-17 Created: 2016-03-17 Last updated: 2016-09-02Bibliographically approved

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Prokhorov, Dmitry
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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf