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Article Dans Une Revue Monthly Notices of the Royal Astronomical Society Année : 2019

Variability studies and modelling of the blazar PKS 2155−304 in the light of a decade of multi-wavelength observations

Résumé

The variability of the high-frequency peaked BL Lac object PKS 2155−304 is studied using almost 10 years of optical, X-ray and γ-ray data. Publicly available data have been gathered and analysed with the aim to characterize the variability and to search for lognormality or periodic behaviour. The optical and X-ray range follow a lognormal process; a hint for a periodicity of about ≈700 d is found in optical and in the high energy (100 MeV < E < 300 GeV) range. A one-zone, time-dependent, synchrotron self-Compton model is successfully used to reproduce the evolution with energy of the variability and the tentatively reported periodicity.

Dates et versions

hal-01990694 , version 1 (23-01-2019)

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Citer

J. Chevalier, D.A. Sanchez, P.D. Serpico, J.-P. Lenain, G. Maurin. Variability studies and modelling of the blazar PKS 2155−304 in the light of a decade of multi-wavelength observations. Monthly Notices of the Royal Astronomical Society, 2019, 484 (1), pp.749-759. ⟨10.1093/mnras/stz027⟩. ⟨hal-01990694⟩
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