University of Hertfordshire

From the same journal

By the same authors

Optical and infrared polarimetry and photometry of blazars

Research output: Contribution to journalArticlepeer-review


  • A.R.G. Mead
  • K.R. Ballard
  • P.W.J.L. Brand
  • J. Hough
  • C. Brindle
  • J. Bailey
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Original languageEnglish
Pages (from-to)183-204
JournalAstronomy and Astrophysics: Supplement Series
Publication statusPublished - 1990


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).


Original article can be found at: Copyright European Southern Observatory

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