Mapping Cygnus A at 3 millimeter wavelength with the MIRIAD system

Details Mapping Cygnus A at 3 millimeter wavelength with the MIRIAD system Mapping Cygnus A at 3 millimeter wavelength with the MIRIAD system

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...402..546w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 402, no. 2, p. 546-549.

Astronomy and Astrophysics

Astrophysics

37

Astronomical Maps, Cygnus Constellation, Millimeter Waves, Radio Galaxies, Image Processing, Software Tools, Very Large Array (Vla)

Scientific paper

We describe the use of the MIRIAD software system in the calibration and mapping of the radio galaxy Cygnus A at frequencies from 86 to 103 GHz. The observations were reduced using a simple mosaicing task as well as a calibration and self-calibration process that handles multiple frequency channels and multiple pointing centers. The reduction process has been automated, with the needed sequence of commands given by a UNIX shell script. We present a 2-arcsec resolution image which resolves the hot spots in each radio lobe, and a multifrequency image with 21-arcsec resolution which determines the extent of the diffuse emission in the extended radio lobes.

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