COMPLETE HISTORY OF THE NEWLY DISCOVERED ACCRETING PULSAR 2RXP J130159.6-635806

摘要

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 ～700s with an average spin up rate of about v ～2×10{sup}(-13)Hz s{sup}(-1). A broad band (1-60keV) spectral analysis of 2RXP J130159.6-635806 based on almost simultaneous XMM-Newton and INTEGRAL data demonstrates that the source has a spectrum typical of an accretion powered X-ray pulsar, i.e. an absorbed power law (T ～0.5-1.0) with a high energy (at ～25keV) cut-off. The long term behaviour of the source, its spectral and timing properties, tend to indicate a high mass X-ray binary with Be companion. We also report on the identification of the likely infrared counterpart to 2RXP J130159.6-635806.