Long term variability of the blazar PKS 2155-304

Frank Rieger; Gilles Maurin; Giovanni Lamanna (for the H.E.S.S. collaboration); Jean-Philippe Lenain; Jill Chevalier; Max Anton Kastendieck

Long term variability of the blazar PKS 2155-304

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arxiv 1509.03104 v2 pith:YP52IRJD submitted 2015-09-10 astro-ph.HE

Long term variability of the blazar PKS 2155-304

Jill Chevalier , Max Anton Kastendieck , Frank Rieger , Gilles Maurin , Jean-Philippe Lenain , Giovanni Lamanna (for the H.E.S.S. collaboration) This is my paper

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keywords variabilityenergybandsfvarinstrumentslognormalityobjectparticular

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Time variability of the photon flux is a known feature of active galactic nuclei (AGN) and in particular of blazars. The high frequency peaked BL Lac (HBL) object PKS 2155-304 is one of the brightest sources in the TeV band and has been monitored regularly with different instruments and in particular with the H.E.S.S. experiment above 200 GeV for more than 11 years. These data together with the observations of other instruments and monitoring programs like SMARTS (optical), Swift-XRT/RXTE/XMM-Newton (X-ray) and Fermi-LAT (100 MeV < E < 300 GeV) are used to characterize the variability of this object in the quiescent state over a wide energy range. Variability studies are made by looking at the lognormality of the light curves and at the fractional root mean square (rms) variability Fvar in several energy bands. Lognormality is found in every energy range and the evolution of Fvar with the energy shows a similar increase both in X-rays and in TeV bands.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

PKS 2155-304: Long-Term Optical Photometric Monitoring and Variability Analysis
astro-ph.GA 2026-07 conditional novelty 4.0

Long-term BVR I monitoring of PKS 2155-304 finds significant multi-timescale variability, spectral hardening, a 2023 flare, weak optical-X-ray correlations, and no significant short-term quasi-periodicity once red noi...