High-frequency VLBI observations of SgrA* during a multi-frequency campaign in May 2007

Details High-frequency VLBI observations of SgrA* during a multi-frequency campaign in May 2007 High-frequency VLBI observations of SgrA* during a multi-frequency campaign in May 2007

2008-09-15

arxiv.org/abs/0809.2463v1

Astronomy and Astrophysics

Astrophysics

6 pages, 5 figures;necessary style files included; contribution for the conference "The Universe under the Microscope" (AHAR 2

Scientific paper

10.1088/1742-6596/131/1/012059

In May 2007 the compact radio source Sgr A* was observed in a global multi-frequency monitoring campaign, from radio to X-ray bands. Here we present and discuss first and preliminary results from polarization sensitive VLBA observations, which took place during May 14-25, 2007. Here, Sgr A* was observed in dual polarization on 10 consecutive days at 22, 43, and 86 GHz. We describe the VLBI experiments, our data analysis, monitoring program and show preliminary images obtained at the various frequencies. We discuss the data with special regard also to the short term variability.

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