2.7-GHz observations of four radio polarization rotators

Details 2.7-GHz observations of four radio polarization rotators 2.7-GHz observations of four radio polarization rotators

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983aj.....88.1616o&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 88, Nov. 1983, p. 1616-1625. NSF-supported research.

Astronomy and Astrophysics

Astronomy

11

Linear Polarization, Quasars, Radiant Flux Density, Radio Astronomy, Bl Lacertae Objects, Radio Spectra, Tables (Data)

Scientific paper

The authors present 2.7-GHz measurements of the flux density and linear polarization of four quasi-stellar objects: 0048-097, 0607-157, 0727-115, and 2200+420 (BL Lac) obtained over an 8-yr period. The broadband (2.7 - 90 GHz) spectral evolution of selected outbursts is also presented. The polarization variations at 2.7 GHz are smaller in amplitude than those observed at higher frequencies. The large changes in position angle observed at 8 GHz in these sources are not seen at 2.7 GHz; and the low-frequency curvature in the radio spectra suggests that the rotations occur within a region which becomes opaque near 2.7 GHz.

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