Open AccessA speedy pixon image reconstruction algorithm
Author(s) -
Eke Vincent
Publication year - 2001
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2001.04253.x
Subject(s) - deconvolution , cosmic microwave background , physics , telescope , noise (video) , galaxy , sky , microwave , algorithm , astrophysics , galaxy cluster , optics , image (mathematics) , computer science , artificial intelligence , anisotropy , quantum mechanics
A speedy pixon algorithm for image reconstruction is described. Two applications of the method to simulated astronomical data sets are also reported. In one case, galaxy clusters are extracted from multiwavelength microwave sky maps using the spectral dependence of the Sunyaev–Zel'dovich effect to distinguish them from the microwave background fluctuations and the instrumental noise. The second example involves the recovery of a sharply peaked emission profile, such as might be produced by a galaxy cluster observed in X‐rays. These simulations show the ability of the technique both to detect sources in low signal‐to‐noise ratio data and to deconvolve a telescope beam in order to recover the internal structure of a source.