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Processing and Display of Spectral Line Absorption Maps

Published online by Cambridge University Press:  12 April 2016

Melvyn Wright
Melvyn Wright*
Affiliation:
Radio Astronomy Laboratory, U.C. Berkeley, California, U.S.A.

Abstract

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We describe the processing and display of aperture synthesis maps of the H I absorption against the radio source Cas A. Then data were obtained with the NRAO interferometer and constitute 384 narrow band maps of Cas A combined to produce a picture of the optical depth and mean velocity of the H I absorption due to the Perseus arm.

Both digital and analogue data techniques have been used to Fourier transform, combine and display the data and the merits and usefulness of each are described.

Type
Part III: Processing Techniques and Display Methods
Information
International Astronomical Union Colloquium , Volume 49: Image Formation from Coherence Functions in Astronomy , 1979 , pp. 157
Copyright
Copyright © Reidel 1979