VLBI Monitoring of the bright gamma-ray blazar PKS 0537-441

Details VLBI Monitoring of the bright gamma-ray blazar PKS 0537-441 VLBI Monitoring of the bright gamma-ray blazar PKS 0537-441

2010-06-10

arxiv.org/abs/1006.2098v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Proceedings of the Workshop "Fermi meets Jansky - AGN in Radio and Gamma-Rays", Savolainen, T., Ros, E., Porcas, R.W. & Zensus

Scientific paper

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.

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