Flux States of Active Galactic Nuclei

Article Article scientifique Article Flux States of Active Galactic Nuclei eng 2019 collaborator Dorner Daniela 681696 collaborator Balbo Matteo 709926 collaborator Blank Michael 723989 collaborator Neronov Andrii 619917 collaborator Sliusar Vitalii 835404 collaborator Walter Roland 23812 FACT Collaboration 57 10.3390/galaxies7020057 2075-4434 https://www.mdpi.com/2075-4434/7/2/57 Blazars are known to show variability on time scales from minutes to years covering a wide range of flux states. Studying the flux distribution of a source allows for various insights. The shape of the flux distribution can provide information on the nature of the underlying variability processes. The level of a possible quiescent state can be derived from the main part of the distribution that can be described by a Gaussian distribution. Dividing the flux states into quiescent and active, the duty cycle of a source can be calculated. Finally, this allows alerting the multi-wavelength and multi-messenger community in case a source is in an active state. To get consistent and conclusive results from flux distributions, unbiased long-term observations are crucial. Only like this is a complete picture of the variability and flux states, e.g., an all-time quiescent state, possible. In seven years of monitoring of bright TeV blazars, the first G-APD Cherenkov telescope (FACT) has collected a total of more than 11,700 hours of physics data with 1500 hours to 3000 hours per source for Mrk 421, Mrk 501, 1ES 1959+650, and 1ES 2344+51. Active galactic nuclei Blazars Monitoring TeV energies FACT Flux states Flux distributions Duty cycle Dewey 520 26 Département d'astronomie 12 false Galaxies 7 2 83d0e8ad-90a7-4260-9d73-eeb2cf8b1774 Article (Published version) Public galaxies-07-00057.pdf 925137 application/pdf CC BY openAccess Faculté des sciences / Département d'astronomie

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Flux States of Active Galactic Nuclei	Galaxies			2019	444	292

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Blank, Michael