Mirage : a new iterative Map-Making code for CMB experiments - IN2P3 - Institut national de physique nucléaire et de physique des particules Accéder directement au contenu
Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2005

Mirage : a new iterative Map-Making code for CMB experiments

Résumé

A major goal of CMB experiments is to obtain highly sensitive CMB maps in order to extract Spherical Harmonic Power Spectrum (SHPS) and cosmological parameters with unprecedented accuracy. We present a new map-making code (Mirage), based on a two-phase iterative algorithm, involving low frequency drift treatment, Butterworth high-pass filtering and conjugate gradient method. This work was strongly motivated by Archeops CMB experiment data analysis. We believe that Archeops was a good test bench for the future Planck Surveyor data analysis, and Mirage was designed in order to be used for Planck data processing with minimal work. A strong feature of Mirage is that it handles experimental problems in data, such as holes in data stream, bright sources, and galaxy side effects, without jeopardising speed. The other advantage is its processing speed, allowing to run Monte Carlo simulations of Archeops data processing on a single processor workstation overnight. Algorithms are explained. Systematic effects on SHPS are investigated on various simulated data, including typical Archeops observational systematics.

Dates et versions

in2p3-00020307 , version 1 (13-12-2006)

Identifiants

Citer

D. Yvon, F. Mayet. Mirage : a new iterative Map-Making code for CMB experiments. Astronomy and Astrophysics - A&A, 2005, 436, pp.729-739. ⟨10.1051/0004-6361:20035920⟩. ⟨in2p3-00020307⟩
9 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More