Authors: | Schleicher, Bernd Arbet-Engels, Axel Baack, Dominik Balbo, Matteo Biland, Adrian Blank, Michael Bretz, Thomas Bruegge, Kai Bulinski, Michael Buss, Jens Doerr, Manuel Dorner, Daniela Elsaesser, Dominik Grischagin, Sergej Hildebrand, Dorothee Linhoff, Lena Mannheim, Karl Mueller, Sebastian Achim Neise, Dominik Neronov, Andrii Noethe, Maximilian Paravac, Aleksander Rhode, Wolfgang Schulz, Florian Sedlaczek, Kevin Shukla, Amit Sliusar, Vitalii Willert, Elan von Walter, Roland |
Title: | Fractional variability—a tool to study blazar variability |
Language (ISO): | en |
Abstract: | Active Galactic Nuclei emit radiation over the whole electromagnetic spectrum up to TeV energies. Blazars are one subtype with their jets pointing towards the observer. One of their typical features is extreme variability on timescales, from minutes to years. The fractional variability is an often used parameter for investigating the degree of variability of a light curve. Different detection methods and sensitivities of the instruments result in differently binned data and light curves with gaps. As they can influence the physics interpretation of the broadband variability, the effects of these differences on the fractional variability need to be studied. In this paper, we study the systematic effects of completeness in time coverage and the sampling rate. Using public data from instruments monitoring blazars in various energy ranges, we study the variability of the bright TeV blazars Mrk 421 and Mrk 501 over the electromagnetic spectrum, taking into account the systematic effects, and compare our findings with previous results. Especially in the TeV range, the fractional variability is higher than in previous studies, which can be explained by the much longer (seven years compared to few weeks) and more complete data sample. |
Subject Headings: | Blazars Variability Fractional variability Active galactic nuclei |
Subject Headings (RSWK): | Blazar Variabilität Aktiver galaktischer Kern |
URI: | http://hdl.handle.net/2003/38251 http://dx.doi.org/10.17877/DE290R-20221 |
Issue Date: | 2019-05-30 |
Rights link: | http://creativecommons.org/licenses/by/4.0/ |
Appears in Collections: | Experimentelle Flavourphysik |
Files in This Item:
File | Description | Size | Format | |
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galaxies-07-00062-v2.pdf | 1.94 MB | Adobe PDF | View/Open |
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