Optical and infrared polarimetry and photometry of blazars

Mead, A.R.G., Ballard, K.R., Brand, P.W.J.L., Hough, J., Brindle, C. and Bailey, J. (1990) Optical and infrared polarimetry and photometry of blazars. Astronomy and Astrophysics: Supplement Series, 83 (1). pp. 183-204. ISSN 0365-0138
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We have carried out a polarization study of 44 blazars and candidate blazars at optical and near-infrared frequencies covering the period 1986 August to 1988 February. The data show flux and polarization properties changing on internight timescales, and commonly exhibit frequency dependence of a spectral index, polarization and polarization position angle. The observations of the quasar 1253 - 055(3C279) showed a U-band polarization of 45.5 ± 0.9%, the highest ever seen in a blazar. The interpretation of the data is the subject of a further paper (Ballard et al., 1989).


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