Scale-sensitive (multiscale) deconvolution of astronomical interferometric images

Sanjay Bhatnagar; T. J. Cornwell

doi:10.1117/12.527056

24 December 2003 Scale-sensitive (multiscale) deconvolution of astronomical interferometric images

Sanjay Bhatnagar, T. J. Cornwell

Proceedings Volume 5169, Astronomical Adaptive Optics Systems and Applications; (2003) https://doi.org/10.1117/12.527056
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

We describe a scale sensitive deconvolution algorithm for interferometric images. An ideal sky model should be able to pick up correlated emission on all scales and of all shapes. Though the problem can be well formulated mathematically, there are two issues: (1) it is computationally prohibitive, and (2) the choice of an appropriate basis to represent the image is not clear. The work presented here is an interim step towards developing a fully scale sensitive deconvolution algorithm which is computationally efficient as well. This approach, though restrictive as compared to the most general model for the sky, is an enormous improvement over other scale insensitive algorithms and forms the logical limit of multi-resolution CLEAN approach. The sky image is represented using parameterized basis functions with finite support and the algorithm solves for these parameters. The computational load in this approach is reduced by working with an analytical approximation of the Point Spread Function.

Citation Download Citation

Sanjay Bhatnagar and T. J. Cornwell "Scale-sensitive (multiscale) deconvolution of astronomical interferometric images", Proc. SPIE 5169, Astronomical Adaptive Optics Systems and Applications, (24 December 2003); https://doi.org/10.1117/12.527056

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