Authors: Dorner, Daniela
Arbet-Engels, Axel
Baack, Dominik
Balbo, Matteo
Biland, Adrian
Blank, Michael
Bretz, Thomas
Bruegge, Kai
Bulinski, Michael
Buss, Jens
Doerr, Manuel
Elsaesser, Dominik
Hildebrand, Dorothee
Linhoff, Lena
Mannheim, Karl
Mueller, Sebastian Achim
Neise, Dominik
Neronov, Andrii
Noethe, Maximilian
Paravac, Aleksander
Rhode, Wolfgang
Schleicher, Bernd
Schulz, Florian
Sedlaczek, Kevin
Shukla, Amit
Sliusar, Vitalii
Willert, Elan von
Walter, Roland
Title: Flux states of active galactic nuclei
Language (ISO): en
Abstract: 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.
Subject Headings: Active galactic nuclei
TeV energies
Flux states
Flux distributions
Duty cycle
Issue Date: 2019-05-21
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Appears in Collections:Experimentelle Flavourphysik

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