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Long Term Monitoring of AGN with the Metsähovi and SEST Telescopes

Published online by Cambridge University Press:  19 July 2016

H. Teräsranta ,
M. Tornikoski  and
E. Valtaoja
H. Teräsranta
Affiliation:
Metsähovi Radio Research Station, Helsinki University of Technology, SF-02540 Kylmälä, Finland
M. Tornikoski
Affiliation:
Metsähovi Radio Research Station, Helsinki University of Technology, SF-02540 Kylmälä, Finland
E. Valtaoja
Affiliation:
Metsähovi Radio Research Station, Helsinki University of Technology, SF-02540 Kylmälä, Finland

Extract

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The monitoring of extragalactic sources with the Metsähovi radio telescope started in 1980. Since then we have made more than 21000 observations at 12, 22, 37, 77 and 87 GHz. Currently we have 84 sources in our sample which should be observed once a month at 22 and 37 GHz. The sample is limited to declinations above −10 degrees. In most cases our sampling is dense enough to cover all the outbursts at these two frequencies, because our earlier observations have shown the timescales of a typical outburst at 22 and 37 GHz to be from 0.3 to several years.

Type
Poster Contributions: Variability
Information
Symposium - International Astronomical Union , Volume 159: Multi-Wavelength Continuum Emission of AGN , 1994 , pp. 410
Copyright
Copyright © Kluwer 1994