Ringo2 Optical Polarimetry of Blazars

Helen Jermak, Iain Steele, Elina Lindfors, Talvikki Hovatta, Kari Nilsson, Gavin Lamb, Carole Mundell, Ulisses Barres De Almeida, Andrei Berdyugin, Ville Kadenius, Riho Reinthal, Leo Takalo

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Abstract

We present polarimetric and photometric observations from a sample of 15 γ-ray bright blazars with data from the Tuorla blazar monitoring program (KVA DIPOL) and Liverpool Telescope (LT) Ringo2 polarimeters (supplemented with γ-ray data from Fermi-LAT). We find that (1) The optical magnitude and γ-ray flux are positively correlated; (2) electric vector position angle rotations can occur in any blazar subclass; (3) there is no difference in the γ-ray flaring rates in the sample between subclasses; flares can occur during and outside of rotations with no preference for this behaviour; (4) the average degree of polarisation (P), optical magnitude and γ-ray flux are lower during a rotation compared with during non-rotation; (5) the number of observed flaring events and optical polarisation rotations are correlated and (6) the maximum observed P increases from ∼10% to ∼30% to ∼40% for subclasses with synchrotron peaks at high, intermediate and low frequencies respectively
Original languageEnglish
Pages (from-to)52
JournalGalaxies
Volume4
Issue number4
DOIs
Publication statusPublished - 26 Oct 2016

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Jermak, H., Steele, I., Lindfors, E., Hovatta, T., Nilsson, K., Lamb, G., ... Takalo, L. (2016). Ringo2 Optical Polarimetry of Blazars. Galaxies, 4(4), 52. https://doi.org/10.3390/galaxies4040052

Ringo2 Optical Polarimetry of Blazars. / Jermak, Helen; Steele, Iain; Lindfors, Elina; Hovatta, Talvikki; Nilsson, Kari; Lamb, Gavin; Mundell, Carole; Barres De Almeida, Ulisses; Berdyugin, Andrei; Kadenius, Ville; Reinthal, Riho; Takalo, Leo.

In: Galaxies, Vol. 4, No. 4, 26.10.2016, p. 52.

Research output: Contribution to journalArticle

Jermak, H, Steele, I, Lindfors, E, Hovatta, T, Nilsson, K, Lamb, G, Mundell, C, Barres De Almeida, U, Berdyugin, A, Kadenius, V, Reinthal, R & Takalo, L 2016, 'Ringo2 Optical Polarimetry of Blazars', Galaxies, vol. 4, no. 4, pp. 52. https://doi.org/10.3390/galaxies4040052
Jermak H, Steele I, Lindfors E, Hovatta T, Nilsson K, Lamb G et al. Ringo2 Optical Polarimetry of Blazars. Galaxies. 2016 Oct 26;4(4):52. https://doi.org/10.3390/galaxies4040052
Jermak, Helen ; Steele, Iain ; Lindfors, Elina ; Hovatta, Talvikki ; Nilsson, Kari ; Lamb, Gavin ; Mundell, Carole ; Barres De Almeida, Ulisses ; Berdyugin, Andrei ; Kadenius, Ville ; Reinthal, Riho ; Takalo, Leo. / Ringo2 Optical Polarimetry of Blazars. In: Galaxies. 2016 ; Vol. 4, No. 4. pp. 52.
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