Optical variability of the TeV blazar 1ES 0806+524 on diverse timescales

• Verfasst von: Pandey, Ashwani [VerfasserIn]
• Verfasst von: Kurtanidze, Omar M. [VerfasserIn]
• Titel: Optical variability of the TeV blazar 1ES 0806+524 on diverse timescales
• Verf.angabe: Ashwani Pandey, Alok C. Gupta, Sofia O. Kurtanidze, Paul J. Wiita, G. Damljanovic, R. Bachev, Jin Zhang, O.M. Kurtanidze, A. Darriba, R.A. Chigladze, G. Latev, M.G. Nikolashvili, S. Peneva, E. Semkov, A. Strigachev, S.N. Tiwari, and O. Vince
• E-Jahr: 2020
• Jahr: 2020 February 13
• Umfang: 11 S.
• Fussnoten: Gesehen am 04.05.2020
• Titel Quelle: Enthalten in: The astrophysical journal / 1
• Ort Quelle: London : Institute of Physics Publ., 1996
• Jahr Quelle: 2020
• Band/Heft Quelle: 890(2020,1) Artikel-Nummer 72, 11 Seiten
• ISSN Quelle: 1538-4357
• DOI: doi:10.3847/1538-4357/ab698e
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1697018858

Abstract

We report the results of our optical (VRI) photometric observations of the TeV blazar 1ES 0806+524 on 153 nights during 2011-2019 using seven optical telescopes in Europe and Asia. We investigated the variability of the blazar on intraday as well as on long-term timescales. We examined 18 intraday light curves for flux and color variations using the most reliable power-enhanced F-test and the nested ANOVA test. Only on one night was a small, but significant, variation found, in both V-band and R-band light curves. The V−R color index was constant on every one of those nights. Flux density changes of around 80% were seen over the course of these eight years in multiple bands. We found a weighted mean optical spectral index of 0.639 ± 0.002 during our monitoring period by fitting a power law () in 23 optical (VRI) spectral energy distributions of 1ES 0806+524. We discuss different possible mechanisms responsible for blazar variability on diverse timescales.