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RoboPol: connection between optical polarization plane rotations and gamma-ray flares in blazars

I. Papamastorakis
A. Ramaprakash
P. Reig
D. Blinov
A. Kus
J. A. Zensus
I. Liodakis
E. Pazderski
N. Kylafis
T. Hovatta
E. Angelakis
I. Myserlis
T. J. Pearson
K. Tassis
S. Maharana
O. G. King
G. V. Panopoulou
S. Kiehlmann
E. Paleologou
I. Papadakis
A. Mahabal
M. Balokovi´c
A. C. S. Readhead
V. Pavlidou

Publication date

October 2022

DOI

10.1093/mnras/stx2786

Publisher

Oxford University Press (OUP)

Journal

Monthly Notices of the Royal Astronomical Society

Abstract

We use results of our 3 yr polarimetric monitoring programme to investigate the previously suggested connection between rotations of the polarization plane in the optical emission of blazars and their gamma-ray flares in the GeV band. The homogeneous set of 40 rotation events in 24 sources detected by RoboPol is analysed together with the gamma-ray data provided by Fermi-LAT. We confirm that polarization plane rotations are indeed related to the closest gamma-ray flares in blazars and the time lags between these events are consistent with zero. Amplitudes of the rotations are anticorrelated with amplitudes of the gamma-ray flares. This is presumably caused by higher relativistic boosting (higher Doppler factors) in blazars that exhibit smal...

Extracted data

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Marecki, A.
Paleologou, E.
Papadakis, I.
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Pazderski, E.
Pearson, T. J.
Prabhudesai, S.
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