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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/017/01-02/0007-0016

    • Keywords

       

      Pulsars: timing noise; power spectra; data processing: CLEAN algorithm

    • Abstract

       

      Spectral analysis of the residual pulsearrival times of pulsars is a useful tool in understanding the nature of the underlying processes that may be responsible for the timing noise observed from pulsars. Power spectra of pulsar timing residuals may be described by one or a combination of powerlaws. As these spectra are expected to be very steep, it is important to ensure a high dynamic range in the estimation of the spectrum. This is difficult in practice since one is, in general, dealing with timing measurements made at unevenly placed epochs. In this paper, we present a technique based on, ‘CLEAN’ to obtain high dynamic 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.

    • Author Affiliations

       

      A. A. Deshpande1 2 F. D’Alessandro1 3 P. M. McCulloch1

      1. Physics Department, University of Tasmania, GPO Box252C, Hobart, Tasmania - 7001, Australia
      2. Raman Research Institute, Bangalore - 560 080, India
      3. Department of Physical Sciences, University of Tasmania at Launceston, PO Box 1214, Launceston, Tasmania - 7250, Australia
    • Dates

       
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