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CTA 102 -- year over year receiving you

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arxiv 1911.08788 v1 pith:IN762F7K submitted 2019-11-20 astro-ph.HE

M. Zacharias , M. Boettcher , F. Jankowsky , J.-P. Lenain , S.J. Wagner , A. Wierzcholska This is my paper · ORCID
classification astro-ph.HE
keywords activitypeakfluxeshigh-stateincreasedyearyear-longablation
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The FSRQ CTA 102 (z=1.032) has been tremendously active over the last few years. During its peak activity lasting several months in late 2016 and early 2017, the gamma-ray and optical fluxes rose by up to a factor 100 above the quiescence level. We have interpreted the peak activity as the ablation of a gas cloud by the relativistic jet, which can nicely account for the months-long lightcurve in 2016 and 2017. The peak activity was in the middle of a 2-year-long high-state, which was characterized by increased fluxes and increased rms variability compared to the previous low-states, and which was flanked by two bright flares. In this presentation, we put the cloud-ablation scenario into the broader context of the 2-year-long high-state.

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