Abstract
Light curves of 49 flat spectrum radio sources with time resolutions of 1 to 4 hours have been obtained with the Effelsberg 100 m telescope and the VLA at cm wavelengths. Intraday variations with amplitudes up to ∼ 30% were found in several sources; in the quasar 0917+624 they are correlated with variations of the polarized flux density by a factor ∼ 3. In the BLLac object 0716+714, coordinated radio and optical observations have revealed correlated variations in both wavelength regimes with typical time scales between ∼ 1 and ∼ 7 days. The latter findings indicate that large amplitude intraday variations are probably intrinsic to the sources; a statistical analysis suggests that that additional contibutions of interstellar scintillation are present at a lower level.
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Quirrenbach, A. (1991). Intraday radio variability of quasars and BL Lac objects. In: Duschl, W.J., Wagner, S.J., Camenzind, M. (eds) Variability of Active Galaxies. Lecture Notes in Physics, vol 377. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0030052
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DOI: https://doi.org/10.1007/BFb0030052
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