VLBI Monitoring of the bright γ-ray blazar PKS 0537−441

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1006.2098.pdf (269.72 KB)

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https://arxiv.org/abs/1006.2098

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http://hdl.handle.net/11603/18225

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UMBC Physics Department
UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)

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2010-06-10

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conference papers and proceedings preprints
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Hungwe, F.; Ojha, R.; Kadler, M.; Booth, R.; Blanchard, J.; Lovell, J.; Muller, C.; Bock, M.; TANAMI team; VLBI Monitoring of the bright γ-ray blazar PKS 0537−441; Cosmology and Nongalactic Astrophysics (2010); https://arxiv.org/abs/1006.2098

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Abstract

One of the defining characteristics of BL Lacertae objects is their strong variability across the electromagnetic spectrum. PKS 0537-441 is one such object and is one of the most luminous blazars from radio to gamma-ray wavelengths. It was detected as a strong and highly variable source by EGRET and has been reported several times to be in an active state by Fermi . It is one of the brightest gamma-ray blazars detected in the southern sky so far. The TANAMI (Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry) program is monitoring PKS 0537-441 at VLBI resolutions. We present 8.4 GHz and 22 GHz images of the milliarcsecond scale structure. We also present our ongoing analysis of the spectral and temporal changes in this object.