A large spin-up rate measured with INTEGRAL in the High Mass X-ray Binary Pulsar SAXJ2103.5+4545
arXiv:astro-ph/0505532 · doi:10.1051/0004-6361:20052961
Abstract
The High Mass X-ray Binary Pulsar SAXJ2103.5+4545 has been observed with INTEGRAL several times during the last outburst in 2002-2004. We report a comprehensive study of all INTEGRAL observations, allowing a study of the pulse period evolution during the recent outburst. We measured a very rapid spin-up episode, lasting 130days, which decreased the pulse period by 1.8s. The spin-up rate, pdot=-1.5e-7 s/s, is the largest ever measured for SAXJ2103.5+4545, and it is among the fastest for an accreting pulsar. The pulse profile shows evidence for temporal variability, apparently not related to the source flux or to the orbital phase. The X-ray spectrum is hard and there is significant emission up to 150keV. A new derivation of the orbital period, based on RXTE data, is also reported.
8 pages, 7 figures, accepted for publication in A&A
References in corpus (11)
- ISGRI: the INTEGRAL Soft Gamma-Ray Imager
- Observations of Accreting Pulsars
- Discovery of the optical counterpart to the X-ray pulsar SAX J2103.5+4545
- First results from the INTEGRAL Galactic plane scans
- Discovery of the Orbit of the Transient X ray Pulsar SAX J2103.5+4545
- Observations of the Transient X-ray Pulsar KS 1947+300 by the INTEGRAL and RXTE Observatories
- Discovery of Soft Spectral Component and Transient 22.7s Quasi Periodic Oscillations of SAX J2103.5+4545
- INTEGRAL observations of the peculiar BeX System SAX J2103.5+4545
- First results of observations of transient pulsar SAXJ2103.5+4545 with the INTEGRAL observatory
- Broadband Observations of the Transient X-ray Pulsar SAX J2103.5+4545
- High-Energy pulse profile of the Transient X-ray Pulsar SAX J2103.5+4545
Cited by in corpus (12)
- High-Mass X-ray Binaries in the Milky Way: A closer look with INTEGRAL
- Timing Studies on RXTE Observations of SAX J2103.5+4545
- Correlated optical/X-ray variability in the high-mass X-ray binary SAX J2103.5+4545
- The quiescent state of the accreting X-ray pulsar SAX J2103.5+4545
- Long-term pulse profile study of the Be/X-ray pulsar SAX J2103.5+4545
- Recent activity of the Be/X-ray binary system SAX J2103.5+4545
- Radiative Column and Light Curve of X-Ray Binary Pulsars
- INTEGRAL-ISGRI observations of the CygOB2 region: earching for hard X-ray point sources in a region containing several non-thermal emitting massive stars
- Discovery of X-ray pulsations in the Be/X-ray binary IGR J21343+4738
- CXOU J005047.9-731817: a 292-s X-ray binary pulsar in the Small Magellanic Cloud
- A possible phase dependent absorption feature in the transient X-ray pulsar SAX J2103.5+4545
- Monte-Carlo simulations on possible collimation effects of outflows to fan-beamed emission of ultraluminous accreting X-ray pulsars