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
