Digital Deblurring of CMB Maps II: Asymmetric Point Spread Function

Details Digital Deblurring of CMB Maps II: Asymmetric Point Spread Function Digital Deblurring of CMB Maps II: Asymmetric Point Spread Function

2003-09-04

arxiv.org/abs/astro-ph/0309145v1

Astron.Astrophys.408:835-844,2003

Astronomy and Astrophysics

Astrophysics

9 pages, 13 Figures

Scientific paper

10.1051/0004-6361:20031108

In this second paper in a series dedicated to developing efficient numerical techniques for the deblurring Cosmic Microwave Background (CMB) maps, we consider the case of asymmetric point spread functions (PSF). Although conceptually this problem is not different from the symmetric case, there are important differences from the computational point of view because it is no longer possible to use some of the efficient numerical techniques that work with symmetric PSFs. We present procedures that permit the use of efficient techniques even when this condition is not met. In particular, two methods are considered: a procedure based on a Kronecker approximation technique that can be implemented with the numerical methods used with symmetric PSFs but that has the limitation of requiring only mildly asymmetric PSFs. The second is a variant of the classic Tikhonov technique that works even with very asymmetric PSFs but that requires discarding the edges of the maps. We provide details for efficient implementations of the algorithms. Their performance is tested on simulated CMB maps.

Affiliated with

Also associated with

No associations

Rating

Digital Deblurring of CMB Maps II: Asymmetric Point Spread Function does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Digital Deblurring of CMB Maps II: Asymmetric Point Spread Function, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital Deblurring of CMB Maps II: Asymmetric Point Spread Function will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-56739