Fourier Plane Image Combination by Feathering. (20th July 2017)

• Record Type: Journal Article
• Authors: Cotton, W. D.
• Is Part Of: Publications of the Astronomical Society of the Pacific. Volume 129:Number 979(2017)
• Publication Date: 2017-07-20
• Subjects: techniques: image processing; Astronomy -- Periodicals; Astronomy; Periodicals; Periodicals; 520.5
• DOI: 10.1088/1538-3873/aa793f
• Languages: English
• ISSNs: 0004-6280

Abstract

Abstract: Astronomical objects frequently exhibit structure over a wide range of scales whereas many telescopes, especially interferometer arrays, only sample a limited range of spatial scales. To properly image these objects, images from a set of instruments covering the range of scales may be needed. These images then must be combined in a manner to recover all spatial scales. This paper describes the feathering technique for image combination in the Fourier transform plane. Implementations in several packages are discussed and example combinations of single dish and interferometric observations of both simulated and celestial radio emission are given.