Issue |
A&A
Volume 419, Number 1, May III 2004
|
|
---|---|---|
Page(s) | 269 - 276 | |
Section | Stellar structure and evolution | |
DOI | https://doi.org/10.1051/0004-6361:20040069 | |
Published online | 23 April 2004 |
XMM-Newton spectral and timing analysis of the faint millisecond pulsars PSR J0751+1807 and PSR J1012+5307
1
Centre d'Étude Spatiale des Rayonnements, 9 avenue du Colonel Roche, 31028 Toulouse Cedex 04, France
2
University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire, SK11 9DL, UK
3
LPCE/CNRS Orléans, 3A avenue de la Recherche Scientifique, 45071 Orléans Cedex 02, France
4
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
Corresponding author: N. A. Webb, Natalie.Webb@cesr.fr
Received:
7
May
2003
Accepted:
2
February
2004
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 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,
, with an unabsorbed flux of
(0.2–10.0 keV). A power
law is also a good description of the spectrum of PSR J1012+5307,
, with an unabsorbed flux of
(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.
Key words: X-rays: stars / stars: pulsars: individual: PSR J0751+1807, PSR J1012+5307 / radiation mechanisms: non-thermal / radiation mechanisms: thermal
© ESO, 2004
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