Abstract
We present simultaneous UBVRI photopolarimetry of 12 blazars and one low polarization quasar, 3C 273. The aim of our observations has been to study frequency-dependent polarization in these sources.
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Valtaoja, L., Sillanpää, A., Valtaoja, E., Efimov, Y., Shakhovskoy, N. (1989). Simultaneous UBVRI polarimetry of blazars. In: Maraschi, L., Maccacaro, T., Ulrich, M.H. (eds) BL Lac Objects. Lecture Notes in Physics, vol 334. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0031153
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DOI: https://doi.org/10.1007/BFb0031153
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