XMM-Newton spectral and timing analysis of the faint millisecond pulsars PSR J0751+1807 and PSR J1012+5307 - Archive ouverte HAL Access content directly
Journal Articles Astronomy and Astrophysics - A&A Year : 2004

XMM-Newton spectral and timing analysis of the faint millisecond pulsars PSR J0751+1807 and PSR J1012+5307

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Abstract

We present XMM-Newton MOS imaging and PN timing data of the faint millisecond pulsars PSR J0751+1807 and PSR J1012+5307. We find 46 sources in the MOS field of view of PSR J0751+1807 searching down to an unabsorbed flux limit of 3 × 10 −15 ergs cm −2 s −1 (0.2-10.0 keV). We present, for the first time, the X-ray spectra of these two faint millisecond pulsars. We find that a power law model best fits the spectrum of PSR J0751+1807, Γ = 1.59 ± 0.20, with an unabsorbed flux of 4.4 × 10 −14 ergs cm −2 s −1 (0.2-10.0 keV). A power law is also a good description of the spectrum of PSR J1012+5307, Γ = 1.78 ± 0.36, with an unabsorbed flux of 1.2 × 10 −13 ergs cm −2 s −1 (0.2-10.0 keV). However, a blackbody model cannot be excluded as the best fit to this data. We present some evidence to suggest that both of these millisecond pulsars show pulsations in this X-ray band. We find some evidence for a single broad X-ray pulse for PSR J0751+1807 and we discuss the possibility that there are two pulses per spin period for PSR J1012+5307.
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Dates and versions

insu-02886678 , version 1 (01-07-2020)

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N.A. Webb, J.F. Olive, D. Barret, M. Kramer, Ismaël Cognard, et al.. XMM-Newton spectral and timing analysis of the faint millisecond pulsars PSR J0751+1807 and PSR J1012+5307. Astronomy and Astrophysics - A&A, 2004, 419 (1), pp.269-276. ⟨10.1051/0004-6361:20040069⟩. ⟨insu-02886678⟩
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