Time series analysis of VLBI astrometric source positions at 24-GHz

Details Time series analysis of VLBI astrometric source positions at 24-GHz Time series analysis of VLBI astrometric source positions at 24-GHz

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jsrs.meet...12b&link_type=abstract

"Proceedings of the "Journées Systèmes de Référence Spatio-temporels 2007". Observatoire de Paris, 17-19 September 2007. Editor:

Astronomy and Astrophysics

Astronomy

Scientific paper

To date there have been 10 VLBI experiments observed over a period spanning 5 years and analyzed for the purpose of establishing a high-frequency (24 GHz) reference frame. The database now contains information on 274 sources and a total of 1052 images. From the data, we have produced a high-frequency astrometric catalog of 266 sources. Of these 266 sources, 88 of them have been observed in at least five epochs. We produced time series of source positions for each of the 88 sources and compare source position variations at 24 GHz with variations in the same sources at X band. Here we discuss the astrometric catalog, the stability of the sources at 24 GHz, and the possible implications for ICRF2.

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