Structure of seven 3C sources at metre wavelengths

Astronomy and Astrophysics – Astronomy

Scientific paper

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Brightness Distribution, Lunar Occultation, Quasars, Radio Sources (Astronomy), Angular Resolution, Astronomical Models, Radio Telescopes, Signal To Noise Ratios

Scientific paper

Results of lunar occultation observations are presented for seven 3C sources with angular resolutions in the range of a fraction of arcsec to a few arcsec. The occultations were observed with a radio telescope at a frequency of 326.5 MHz; bandwidths of 3.8, 1.0, or 0.3 MHz and time constants of 1 or 0.5 s were used, depending on the signal-to-noise ratio. The results are combined with those of IPS and interferometric observations by others to infer the fine structural details. Of particular interest are the structures of the quasars 3C2 and 3C279. Both these sources consist of compact meter-wavelength components in the vicinity of the QSO's.

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