6533b820fe1ef96bd1279c2e
RESEARCH PRODUCT
INTEGRAL observations of the peculiar BeX System SAX J2103.5+4545
Pablo ReigPere BlayP. ConnellA. CameroS. Martínez NúñezVictor Reglerosubject
AccretionPhotonAstrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesValue (computer science)AstrophysicsUNESCO::ASTRONOMÍA Y ASTROFÍSICAAstrophysicsLuminosityPulse periodPosition (vector)X-raysBright statePhysicsRange (particle radiation)Astrophysics (astro-ph)BinariesSAX J2103.5+4545 [Pulsars]BeAstronomy and Astrophysics:ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia [UNESCO]Space and Planetary ScienceAccretion disksUNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogoniaEmission-lineAccretion ; Accretion disks ; Binaries ; Emission-line ; Be ; Pulsars : SAX J2103.5+4545 ; X-rays ; Binaries:ASTRONOMÍA Y ASTROFÍSICA [UNESCO]Energy (signal processing)description
We present an INTEGRAL data analysis of the X-ray transient \object{SAX J2103.5+4545} during two outbursts detected in December 2002. The INTEGRAL coordinates and error circle agree with the position of the recently proposed optical counterpart. A power-law plus cut-off model provided a good fit to the 4-150 keV spectrum yielding a photon index of 1.0+-0.1, a cut-off energy E_cut=7.6+-2.0 keV and a folding energy E_fold=30.9+-2.5 keV. The X-ray luminosity in the 4-150 keV energy range was found to be 6.0x10^36 erg/s, assuming a distance of 6.5 kpc. This luminosity, together with the derived photon index, indicate that the source is in a bright state. A 354.9$+-0.5 second pulse period is measured. This value is significantly smaller than previous measurements, indicating a long-term spin-up episode.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-07-28 | Astronomy & Astrophysics |