Intra-night optical polarization monitoring of blazars
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arXiv
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2025
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| author | Polychronakis, Aristeidis Liodakis, Ioannis Glykopoulou, Anastasia Blinov, Dmitry Agudo, Ivan Jorstad, Svetlana G. Agis-Gonzalez, Beatriz Capecchiacci, Sara Floris, Alberto Kielhmann, Sebastian Kypriotakis, John A. Langis, Dimitrios A. Mandarakas, Nikos Pal, Karan Aceituno, Francisco J. Bonnoli, Giacomo Casanova, Victor Emery, Gabriel Pedrosa, Juan Escudero Otero-Santos, Jorge Morcuende, Daniel Sota, Alfredo Piirola, Vilppu |
| author_facet | Polychronakis, Aristeidis Liodakis, Ioannis Glykopoulou, Anastasia Blinov, Dmitry Agudo, Ivan Jorstad, Svetlana G. Agis-Gonzalez, Beatriz Capecchiacci, Sara Floris, Alberto Kielhmann, Sebastian Kypriotakis, John A. Langis, Dimitrios A. Mandarakas, Nikos Pal, Karan Aceituno, Francisco J. Bonnoli, Giacomo Casanova, Victor Emery, Gabriel Pedrosa, Juan Escudero Otero-Santos, Jorge Morcuende, Daniel Sota, Alfredo Piirola, Vilppu |
| contents | Blazars are known for their extreme variability across the electromagnetic spectrum. Variability at very short timescales can push the boundaries between competing models offering us much needed discriminating power. This is particularly true for polarization variability that allows us to probe particle acceleration and high-energy emission models in blazars. Here we present results from the first pilot study of intra-night optical polarization monitoring conducted using RoboPol at the Skinakas Observatory and supplemented by observations from the Calar Alto, Perkins, and Sierra Nevada observatories. Our results show that while variability patterns can widely vary between sources, variability on timescales as short as minutes is prevalent in blazar jets. The amplitude of variations are typically small, a few percent for the polarization degree and less than 20 degrees for the polarization angle, pointing to a significant contribution to the optical emission from a turbulent magnetic field component, while the overall stability of the polarization angle over time points to a preferred magnetic field orientation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_10736 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Intra-night optical polarization monitoring of blazars Polychronakis, Aristeidis Liodakis, Ioannis Glykopoulou, Anastasia Blinov, Dmitry Agudo, Ivan Jorstad, Svetlana G. Agis-Gonzalez, Beatriz Capecchiacci, Sara Floris, Alberto Kielhmann, Sebastian Kypriotakis, John A. Langis, Dimitrios A. Mandarakas, Nikos Pal, Karan Aceituno, Francisco J. Bonnoli, Giacomo Casanova, Victor Emery, Gabriel Pedrosa, Juan Escudero Otero-Santos, Jorge Morcuende, Daniel Sota, Alfredo Piirola, Vilppu High Energy Astrophysical Phenomena Blazars are known for their extreme variability across the electromagnetic spectrum. Variability at very short timescales can push the boundaries between competing models offering us much needed discriminating power. This is particularly true for polarization variability that allows us to probe particle acceleration and high-energy emission models in blazars. Here we present results from the first pilot study of intra-night optical polarization monitoring conducted using RoboPol at the Skinakas Observatory and supplemented by observations from the Calar Alto, Perkins, and Sierra Nevada observatories. Our results show that while variability patterns can widely vary between sources, variability on timescales as short as minutes is prevalent in blazar jets. The amplitude of variations are typically small, a few percent for the polarization degree and less than 20 degrees for the polarization angle, pointing to a significant contribution to the optical emission from a turbulent magnetic field component, while the overall stability of the polarization angle over time points to a preferred magnetic field orientation. |
| title | Intra-night optical polarization monitoring of blazars |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2511.10736 |