文章基本信息

标题：VLBA observations of Intraday Variable Sources
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作者：B. Moloney ; D. Gabuzda
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2006
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present preliminary results of VLBA observations of a set of Intraday Variable sources. These sources were observed at 8 and 15-GHz by both the VLA and VLBA arrays in 1997. Our analysis yielded VLBA maps of these sources in both intensity and polarisation, while the VLA data provided information about the integrated variability of the sources during the VLBA run. These data indicate appreciable polarisation variability in several sources, which can be investigated by making VLBA Q and U maps for separate time intervals during the run. We present 15- GHz polarisation maps of 0917+624 which may suggest the region where the variability of this source originated. A comparison of the VLA and total VLBA polarisation shows that the VLA and VLBA variability of the sources during the VLBA run are correlated, demonstrating that the observed VLA variability is detected by the VLBA data