APPLICATION OF CLEAN IN THE POWER SPECTRAL-ANALYSIS OF NONUNIFORMLY SAMPLED PULSAR TIMING DATA

Citation
Aa. Deshpande et al., APPLICATION OF CLEAN IN THE POWER SPECTRAL-ANALYSIS OF NONUNIFORMLY SAMPLED PULSAR TIMING DATA, Journal of astrophysics and astronomy, 17(1-2), 1996, pp. 7-16
Citations number
14
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Astronomy & Astrophysics
ISSN journal
0250-6335
Volume
17
Issue
1-2
Year of publication
1996
Pages
7 - 16
Database
ISI
SICI code
0250-6335(1996)17:1-2<7:AOCITP>2.0.ZU;2-S
Abstract
Spectral analysis of the residual pulse-arrival times of pulsars is a useful tool in understanding the nature of the underlying processes th at may be responsible for the timing noise observed from pulsars. Powe r spectra of pulsar timing residuals may be described by one or a comb ination of power-laws. As these spectra are expected to be very steep, it is important to ensure a high dynamic range in the estimation of t he spectrum. This is difficult in practice since one is, in general, d ealing with timing measurements made at unevenly placed epochs. In thi s paper, we present a technique based on 'CLEAN' to obtain high dynami c range spectra from unevenly sampled data. We compare the performance of this technique with other techniques including some that were used earlier for estimation of power spectra of pulsar timing residuals.