McCall, C, Jermak, H, Steele, IA, Agudo, I, de Almeida, UB, Hovatta, T, Lamb, GP, Lindfors, E and 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, 532 (2). pp. 2788-2819. ISSN 0035-8711

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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.

Item Type:	Article
Uncontrolled Keywords:	0201 Astronomical and Space Sciences; Astronomy & Astrophysics
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Divisions:	Astrophysics Research Institute
Publisher:	Oxford University Press (OUP)
SWORD Depositor:	A Symplectic
Date Deposited:	23 Sep 2024 16:13
Last Modified:	23 Sep 2024 16:15
DOI or ID number:	10.1093/mnras/stae1693
URI:	https://researchonline.ljmu.ac.uk/id/eprint/24245

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