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    XMM-Newton observation of the very old pulsar J0108-1431

    Access Status
    Open access via publisher
    Authors
    Posselt, B.
    Arumugasamy, P.
    Pavlov, G.
    Manchester, R.
    Shannon, Ryan
    Kargaltsev, O.
    Date
    2012
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Posselt, B. and Arumugasamy, P. and Pavlov, G. and Manchester, R. and Shannon, R. and Kargaltsev, O. 2012. XMM-Newton observation of the very old pulsar J0108-1431. Astrophysical Journal. 761 (2): Article ID 117.
    Source Title
    Astrophysical Journal
    DOI
    10.1088/0004-637X/761/2/117
    ISSN
    0004-637X
    School
    Curtin Institute of Radio Astronomy (Physics)
    URI
    http://hdl.handle.net/20.500.11937/7206
    Collection
    • Curtin Research Publications
    Abstract

    We report on an X-ray observation of the 166 Myr old radio pulsar J0108–1431 with XMM-Newton. The X-ray spectrum can be described by a power-law model with a relatively steep photon index Γ ≈ 3 or by a combination of thermal and non-thermal components, e.g., a power-law component with fixed photon index Γ = 2 plus a blackbody component with a temperature of kT = 0.11 keV. The two-component model appears more reasonable considering different estimates for the hydrogen column density N H. The non-thermal X-ray efficiency in the single power-law model is η PL1-10keV/E ~ 0.003, higher than in most other X-ray-detected pulsars. In the case of the combined model, the non-thermal and thermal X-ray efficiencies are even higher, η PL1-10keV ~ ηbbPC ~ 0.006. We detected X-ray pulsations at the radio period of P ≈ 0.808 s with significance of ≈7σ. The pulse shape in the folded X-ray light curve (0.15-2 keV) is asymmetric, with statistically significant contributions from up to five leading harmonics. Pulse profiles at two different energy ranges differ slightly: the profile is asymmetric at low energies, 0.15-1 keV, while at higher energies, 1-2 keV, it has a nearly sinusoidal shape. The radio pulse peak leads the 0.15-2 keV X-ray pulse peak by Δ ø = 0.06 ± 0.03.

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