Search for extended γ-ray emission around AGN with MAGIC telescopes

Da Vela, P. (2015) Search for extended γ-ray emission around AGN with MAGIC telescopes. Il nuovo cimento C, 38 (2). pp. 1-11. ISSN 1826-9885

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Abstract

TeV photons coming from a distant extragalactic source are not able to propagate over large distances because they interact with the extragalactic background light photons producing pairs e+e−. These pairs, in turn, interact with the cosmic microwave background via inverse-compton producing a secondary γ-ray emission at lower energies. Extragalactic magnetic fields alter the trajectories of the electron pairs hence the secondary emission can be extended around the TeV sources. This process can be used to constrain the magnetic fields in the inter-galactic medium. We present the study of the emission profile of the blazar Markarian 421 yielding upper limit on the halo flux of the order of 1.5% Crab units in the energy range 300–1300 GeV.

Item Type: Article
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 27 May 2020 15:25
Last Modified: 27 May 2020 15:25
URI: http://eprints.bice.rm.cnr.it/id/eprint/19008

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