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Chevalier, J; Sanchez, D A; Serpico, P D; Lenain, J-P; Maurin, G
Monthly Notices of the Royal Astronomical Society, 03/2019, Volume: 484, Issue: 1Journal Article
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.
