A multiple beam technique for overcoming atmospheric limitations to single-dish observations of extended radio sources

Details A multiple beam technique for overcoming atmospheric limitations to single-dish observations of extended radio sources A multiple beam technique for overcoming atmospheric limitations to single-dish observations of extended radio sources

Jun 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....76...92e&link_type=abstract

Astronomy and Astrophysics, vol. 76, no. 1, June 1979, p. 92-105.

Astronomy and Astrophysics

Astronomy

199

Astronomical Maps, Atmospheric Effects, Extragalactic Radio Sources, Infrared Astronomy, Radio Astronomy, Atmospheric Attenuation, Atmospheric Radiation, Block Diagrams, Continuous Radiation, Fourier Transformation, Galactic Nuclei, Graphs (Charts), Microwave Emission, Milky Way Galaxy, Radio Telescopes, Supernova Remnants

Scientific paper

A technique is described for dual-beam radio observations of objects extending over several units of beam separation, which are performed at a wavelength of 2.8 cm under meteorological conditions that would be totally unacceptable for a conventional single-beam system. The method of data analysis is outlined, and the capabilities and limitations of the dual-beam technique are examined. Examples of applications of this technique to extragalactic radio sources, a supernova remnant, and the Galactic center are provided. A further development of the technique with the use of a multibeam system is also discussed. It is noted that the dynamic range of observations made with the dual-beam technique is limited primarily by dissimilarities in the detailed shape of each beam and its sidelobes.

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