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    Time-domain and spectral properties of pulsars at 154 MHz

    245960_245960.pdf (1.167Mb)
    Access Status
    Open access
    Authors
    Bell, M.
    Murphy, T.
    Johnston, S.
    Kaplan, D.
    Croft, S.
    Hancock, P.
    Callingham, J.
    Zic, A.
    Dobie, D.
    Swiggum, J.
    Rowlinson, A.
    Hurley-Walker, N.
    Offringa, A.
    Bernardi, G.
    Bowman, J.
    Briggs, F.
    Cappallo, R.
    Deshpande, A.
    Gaensler, B.
    Greenhill, L.
    Hazelton, B.
    Johnston-Hollitt, M.
    Lonsdale, C.
    McWhirter, S.
    Mitchell, D.
    Morales, M.
    Morgan, E.
    Oberoi, D.
    Ord, S.
    Prabu, T.
    Udaya Shankar, N.
    Srivani, K.
    Subrahmanyan, R.
    Tingay, Steven
    Wayth, Randall
    Webster, R.
    Williams, A.
    Williams, C.
    Date
    2016
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Bell, M. and Murphy, T. and Johnston, S. and Kaplan, D. and Croft, S. and Hancock, P. and Callingham, J. et al. 2016. Time-domain and spectral properties of pulsars at 154 MHz. Monthly Notices of the Royal Astronomical Society. 461 (1): pp. 908-921.
    Source Title
    Monthly Notices of the Royal Astronomical Society
    DOI
    10.1093/mnras/stw1293
    ISSN
    0035-8711
    School
    Curtin Institute of Radio Astronomy (Physics)
    Remarks

    This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

    URI
    http://hdl.handle.net/20.500.11937/16193
    Collection
    • Curtin Research Publications
    Abstract

    We present 154 MHz Murchison Widefield Array imaging observations and variability information for a sample of pulsars. Over the declination range −80° < δ < 10°, we detect 17 known pulsars with mean flux density greater than 0.3 Jy. We explore the variability properties of this sample on time-scales of minutes to years. For three of these pulsars, PSR J0953+0755, PSR J0437−4715, and PSR J0630−2834, we observe interstellar scintillation and variability on time-scales of greater than 2 min. One further pulsar, PSR J0034−0721, showed significant variability, the physical origins of which are difficult to determine. The dynamic spectra for PSR J0953+0755 and PSR J0437−4715 show discrete time and frequency structure consistent with diffractive interstellar scintillation and we present the scintillation bandwidth and time-scales from these observations. The remaining pulsars within our sample were statistically non-variable. We also explore the spectral properties of this sample and find spectral curvature in pulsars PSR J0835−4510, PSR J1752−2806, and PSR J0437−4715.

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