We present a new approach for statistical inference on noise properties of CMB anisotropy data. We consider a Maximum Likelihood parametric estimator to recover the full dependence structure of the noise process. We also consider a semiparametric procedure which is only sensitive to the low frequency behavior of the noise spectral density. Both approaches are statistically robust and computationally convenient in the case of long memory noise, even under nonstationary circumstances. We show that noise properties can be consistently derived by such procedures without resorting to currently used iterative noise-signal methods. More importantly, we show that optimal (GLS) CMB maps can be obtained from the observed timestream with the only knowledge of the noise memory parameter, the outcome of our estimators.

Natoli, P., Marinucci, D., Cabella, P., DE GASPERIS, G., Vittorio, N. (2002). Non-iterative methods to estimate the in-flight noise properties of CMB detectors. ASTRONOMY & ASTROPHYSICS, 383, 1100-1112 [10.1051/0004-6361:20011788].

Non-iterative methods to estimate the in-flight noise properties of CMB detectors

NATOLI, PAOLO;MARINUCCI, DOMENICO;CABELLA, PAOLO;DE GASPERIS, GIANCARLO;VITTORIO, NICOLA
2002-01-01

Abstract

We present a new approach for statistical inference on noise properties of CMB anisotropy data. We consider a Maximum Likelihood parametric estimator to recover the full dependence structure of the noise process. We also consider a semiparametric procedure which is only sensitive to the low frequency behavior of the noise spectral density. Both approaches are statistically robust and computationally convenient in the case of long memory noise, even under nonstationary circumstances. We show that noise properties can be consistently derived by such procedures without resorting to currently used iterative noise-signal methods. More importantly, we show that optimal (GLS) CMB maps can be obtained from the observed timestream with the only knowledge of the noise memory parameter, the outcome of our estimators.
2002
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/05 - ASTRONOMIA E ASTROFISICA
English
Con Impact Factor ISI
COSMOLOGY: COSMIC MICROWAVE BACKGROUND, METHODS: STATISTICAL, DATA ANALYSIS
http://www.aanda.org/index.php?option=com_article&access=doi&doi=10.1051/0004-6361:20011788&Itemid=129
Natoli, P., Marinucci, D., Cabella, P., DE GASPERIS, G., Vittorio, N. (2002). Non-iterative methods to estimate the in-flight noise properties of CMB detectors. ASTRONOMY & ASTROPHYSICS, 383, 1100-1112 [10.1051/0004-6361:20011788].
Natoli, P; Marinucci, D; Cabella, P; DE GASPERIS, G; Vittorio, N
Articolo su rivista
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/67539
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact