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Discovery and study of the accreting pulsar 2RXP J130159.6-635806

Published online by Cambridge University Press:  12 May 2006

M. Chernyakova
Affiliation:
INTEGRAL Science Data Centre, Chemin d'Écogia 16, 1290 Versoix, Switzerland email: Masha.Chernyakova@obs.unige.ch Geneva Observatory, 51 ch. des Maillettes, CH-1290 Sauverny, Switzerland
A. Lutovinov
Affiliation:
Space Research Institute, 84/32 Profsoyuznaya Street, Moscow 117997, Russia
J. Rodriguez
Affiliation:
INTEGRAL Science Data Centre, Chemin d'Écogia 16, 1290 Versoix, Switzerland email: Masha.Chernyakova@obs.unige.ch CEA Saclay, DSM/DAPNIA/Service d'Astrophysique (CNRS UMR 7158 AIM), 91191 Gif sur Yvette, France
M. Revnivtsev
Affiliation:
Space Research Institute, 84/32 Profsoyuznaya Street, Moscow 117997, Russia Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, D-85740 Garching bei München, Germany
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Abstract

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We report on analysis of the poorly studied source 2RXP J130159.6-635806 at different epochs with ASCA, BeppoSAX, XMM-Newton and INTEGRAL. The source shows coherent X-ray pulsations at a period ${\sim}700$ s with $\dot{\nu}\sim 2\times 10^{-13}$ Hz s$^{-1}$. A broad band (1–60 keV) spectral analysis of 2RXP J130159.6-635806 based on almost simultaneous XMM-Newton and INTEGRAL data demonstrates that the source spectrum is an absorbed power law with a photon index $\Gamma\sim 0.5-1.0$ and a cut-off energy of ${\sim}25$ keV. We also report on the identification of the likely infrared counterpart to 2RXP J130159.6-635806. The interstellar reddening does not allow us to strongly constrain the spectral type of the counterpart. The latter is, however, consistent with a Be star, the kind of which is often observed in accretion powered X-ray pulsars.

Type
Contributed Papers
Copyright
2006 International Astronomical Union