The optical polarization properties of blazars

Details The optical polarization properties of blazars The optical polarization properties of blazars

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26as...71..565k&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 71, no. 3, Dec. 1987, p. 565-568. Research supported by the

Astronomy and Astrophysics

Astrophysics

5

Bl Lacertae Objects, Blazars, Optical Polarization, Quasars, Infrared Spectra, Polarimetry, Signal To Noise Ratios, Synchrotron Radiation, Ubv Spectra

Scientific paper

Optical polarimetry in UBVRI wavebands is reported for three BL Lacertae objects and one highly polarized quasar. Two objects, PKS 0735+178 and ON 325, exhibit wavelength independent polarization and position angle with polarimetric signal-to-noise ratios greater than 7 and 30, respectively. The highly polarized quasar 4C 29.45 shows a large differential rotation in its plane of polarization (56°±18°.4) from U to V band. Also two distinct slopes in polarization angle, one from U to V band and the other from V to I band, are observed. The most plausible model to explain the observed changes in the polarization angle for 4C 29.5, seems to be a two-component synchrotron model.

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