Image analysis of the observations of the DA240 region with the Miyun radio telescope

Details Image analysis of the observations of the DA240 region with the Miyun radio telescope Image analysis of the observations of the DA240 region with the Miyun radio telescope

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987acasn..28..250w&link_type=abstract

(Acta Astronomica Sinica, vol. 28, no. 1-4, 1987, p. 250-259) Chinese Astronomy and Astrophysics (ISSN 0275-1062), vol. 12, Marc

Astronomy and Astrophysics

Astrophysics

Astronomical Maps, Galactic Radiation, Image Analysis, Radio Galaxies, Atmospheric Correction, Atmospheric Refraction, Image Processing

Scientific paper

The image-processing procedures described by Wei (1985 and 1986) are explained, illustrated with block diagrams, and demonstrated on observations of the giant radio galaxy DA240, obtained at 232 MHz with the Miyun meter-wave synthesis radio telescope. Particular attention is given to (1) the treatment of phase and gain errors, ionospheric effects, instrument zero-point offsets, and various types of noise and (2) the application of the modified CLEAN algorithm of Wei (1985) to eliminate sidelobes and gravity lobes. Ruled-surface and contour maps of the DA240 region before and after processing are shown.

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