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Galaxies 2017, 5(3), 52; doi:10.3390/galaxies5030052

SALT Spectropolarimetry and Self-Consistent SED and Polarization Modeling of Blazars

1
Centre for Space Research, North-West University, Potchefstroom 2520, South Africa
2
Department of Physics, University of the Free State, Bloemfontein 9300, South Africa
3
South African Astronomical Observatory, Cape Town—Observatory 7935, South Africa
Based on observations made with the Southern African Large Telescope (SALT) under programme 2016-2-LSP-001 (PI: D. A. H. Buckley).
For the Fermi-LAT collaboration.
*
Author to whom correspondence should be addressed.
Academic Editors: Emmanouil Angelakis and Jose L. Gómez
Received: 31 July 2017 / Revised: 6 September 2017 / Accepted: 7 September 2017 / Published: 11 September 2017
(This article belongs to the Special Issue Polarised Emission from Astrophysical Jets)
View Full-Text   |   Download PDF [503 KB, uploaded 13 September 2017]   |  

Abstract

We report on recent results froma target-of-opportunity program to obtain spectropolarimetry observations with the Southern African Large Telescope (SALT) on flaring gamma-ray blazars. SALT spectropolarimetry and contemporaneous multi-wavelength spectral energy distribution (SED) data are being modelled self-consistently with a leptonic single-zone model. Such modeling provides an accurate estimate of the degree of order of the magnetic field in the emission region and the thermal contributions (from the host galaxy and the accretion disk) to the SED, thus putting strong constraints on the physical parameters of the gamma-ray emitting region. For the specific case of the γ -ray blazar 4C+01.02, we demonstrate that the combined SED and spectropolarimetry modeling constrains the mass of the central black hole in this blazar to M BH 10 9 M . View Full-Text
Keywords: active galaxies: blazars; gamma-rays; polarization: optical; spectropolarimetry active galaxies: blazars; gamma-rays; polarization: optical; spectropolarimetry
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Böttcher, M.; van Soelen, B.; Britto, R.J.; Buckley, D.A.H.; Marais, J.P.; Schutte, H. SALT Spectropolarimetry and Self-Consistent SED and Polarization Modeling of Blazars. Galaxies 2017, 5, 52.

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