Back to Volume
Paper: Serendipitous VLBI Observations of Intraday Variability in the BL Lac Objects 1334-127, 2131-021, and 2155-152
Volume: 144, Radio Emission from Galactic and Extragalactic Compact Sources, IAU Colloquium 164
Page: 273
Authors: Kochanev, P. Y.; Gabuzda, D. C.
Abstract: Global lambda = 6 cm VLBI polarization observations of intraday variability in the three BL Lacertae objects 1334-127, 2131-021, and 2155-152 are analyzed. Integrated VLA measurements during the VLBI observations show that although there were no substantial total intensity variations, the polarizations for these three sources varied significantly during the VLBI experiment. The VLBI data were divided into 2-3 hour segments in order to search for corresponding rapid variability in the VLBI polarization structure. Our analysis shows that the VLA polarization variability in 2155-152 and 2131-021 is present in the VLBI data (\ie, it occurred on mas scales), but this is not the case for 1334-127.
Back to Volume