Distinguishing radiation mechanisms and particle populations in blazar jets through long-term multiband monitoring with RINGO3 and Fermi
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2024-08-01
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en
Pages
32
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Monthly Notices of the Royal Astronomical Society, Volume 532, issue 2, pp. 2788-2819
Abstract
We present the results of seven years of multicolour photometric monitoring of a sample of 31 γ -ray bright blazars using the RINGO3 polarimeter on the Liverpool Telescope from 2013–2020. We explore the relationships between simultaneous observations of flux in three optical wavebands along with Fermiγ -ray data in order to explore the radiation mechanisms and particle populations in blazar jets. We find significant correlations between optical and γ -ray flux with no detectable time lag, suggesting leptonic emission processes in the jets of these sources. Furthermore, we find the spectral behaviour against optical and γ -ray flux for many sources is best fit logarithmically. This is suggestive of a transition between bluer-/redder-when-brighter into stable-when-brighter behaviour during high activity states; a behaviour that might be missed in poorly sampled data, resulting in apparent linear relationships.Description
Publisher Copyright: © 2024 The Author(s).
Keywords
BL Lacertae objects: general, galaxies: active, galaxies: jets, galaxies: photometry, quasars: general
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Citation
McCall, C, Jermak, H, Steele, I A, Agudo, I, de Almeida, U B, Hovatta, T, Lamb, G P, Lindfors, E & Mundell, C 2024, ' Distinguishing radiation mechanisms and particle populations in blazar jets through long-term multiband monitoring with RINGO3 and Fermi ', Monthly Notices of the Royal Astronomical Society, vol. 532, no. 2, pp. 2788-2819 . https://doi.org/10.1093/mnras/stae1693