2011A&A...532A..71R


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.03CEST21:11:33

2011A&A...532A..71R - Astronomy and Astrophysics, volume 532A, 71-71 (2011/8-1)

A multi-scale multi-frequency deconvolution algorithm for synthesis imaging in radio interferometry.

RAU U. and CORNWELL T.J.

Abstract (from CDS):

We describe MS-MFS, a multi-scale multi-frequency deconvolution algorithm for wide-band synthesis-imaging, and present imaging results that illustrate the capabilities of the algorithm and the conditions under which it is feasible and gives accurate results. The MS-MFS algorithm models the wide-band sky-brightness distribution as a linear combination of spatial and spectral basis functions, and performs image-reconstruction by combining a linear-least-squares approach with iterative χ2 minimization. This method extends and combines the ideas used in the MS-CLEAN and MF-CLEAN algorithms for multi-scale and multi-frequency deconvolution respectively, and can be used in conjunction with existing wide-field imaging algorithms. We also discuss a simpler hybrid of spectral-line and continuum imaging methods and point out situations where it may suffice. We show via simulations and application to multi-frequency VLA data and wideband EVLA data, that it is possible to reconstruct both spatial and spectral structure of compact and extended emission at the continuum sensitivity level and at the angular resolution allowed by the highest sampled frequency.

Abstract Copyright:

Journal keyword(s): techniques: interferometric - techniques: image processing - methods: numerical - radio continuum: general

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5824 0
2 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6207 3
3 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3715 1
4 NAME Cyg A Sy2 19 59 28.35645829 +40 44 02.0966496   16.22 15.10     ~ 2112 2

    Equat.    Gal    SGal    Ecl

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2020.07.03-21:11:33

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