0000000000208626

AUTHOR

Katja Pottschmidt

showing 4 related works from this author

A 0535+26 in the August/September 2005 outburst observed by RXTE and INTEGRAL

2007

In this Letter we present results from INTEGRAL and RXTE observations of the spectral and timing behavior of the High Mass X-ray Binary A 0535+26 during its August/September 2005 normal (type I) outburst with an average flux F(5-100keV)~400mCrab. The search for cyclotron resonance scattering features (fundamental and harmonic) is one major focus of the paper. Our analysis is based on data from INTEGRAL and RXTE Target of Opportunity Observations performed during the outburst. The pulse period is determined. X-ray pulse profiles in different energy ranges are analyzed. The broad band INTEGRAL and RXTE pulse phase averaged X-ray spectra are studied. The evolution of the fundamental cyclotron …

Astrophysics::High Energy Astrophysical PhenomenaCyclotronCyclotron resonanceFluxFOS: Physical sciencesAstrophysicsUNESCO::ASTRONOMÍA Y ASTROFÍSICAAstrophysicsSpectral linelaw.inventionlawX-raysLine (formation)PhysicsScatteringAstrophysics (astro-ph)Astronomy and AstrophysicsIndividual StarStars:ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia [UNESCO]Pulse (physics)X-rays ; binaries ; Stars ; Magnetic fields ; Individual Star ; A0535+26A0535+26Space and Planetary ScienceMagnetic fieldsHarmonicUNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogoniabinaries:ASTRONOMÍA Y ASTROFÍSICA [UNESCO]
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INTEGRAL long-term monitoring of the Supergiant Fast X-ray Transient XTE J1739-302

2008

In the past few years, a new class of High Mass X-Ray Binaries (HMXRB) has been claimed to exist, the Supergiant Fast X-ray Transients (SFXT). These are X-ray binary systems with a compact companion orbiting a supergiant star which show very short and bright outbursts in a series of activity periods overimposed on longer quiescent periods. Only very recently the first attempts to model the behaviour of these sources have been published, some of them within the framework of accretion from clumpy stellar winds.Our goal is to analyze the properties of XTE J1739-302/IGR J17391-3021 within the context of the clumpy structure of the supergiant wind. We have used INTEGRAL and RXTE/PCA observations…

X-ray transientAstrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesBinary numberContext (language use)AstrophysicsAstrophysicsSpectral lineBinaries : close; Supergiants; X-rays : binaries:ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia::Fuentes de Rayos X [UNESCO]UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia::Fuentes de Rayos XAstrophysics::Solar and Stellar AstrophysicsUNESCO::ASTRONOMÍA Y ASTROFÍSICA::Otras especialidades astronómicasAstrophysics::Galaxy AstrophysicsPhysicsAccretion (meteorology)Astrophysics (astro-ph)Astronomy and AstrophysicsLight curveSupergiantsSpace and Planetary ScienceLong term monitoringbinaries [X-rays]Supergiantclose [Binaries]:ASTRONOMÍA Y ASTROFÍSICA::Otras especialidades astronómicas [UNESCO]
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INTEGRAL/RXTE Observations of Cygnus X-1

2003

We present first results from contemporaneous observations of Cygnus X-1 with INTEGRAL and RXTE, made during INTEGRAL's performance verification phase in 2002 November and December. Consistent with earlier results, the 3-250 keV data are well described by Comptonization spectra from a Compton corona with a temperature of kT~50-90 keV and an optical depth of tau~1.0-1.3 plus reflection from a cold or mildly ionized slab with a covering factor of Omega/2pi~0.2-0.3. A soft excess below 10 keV, interpreted as emission from the accretion disk, is seen to decrease during the 1.5 months spanned by our observations. Our results indicate a remarkable consistency among the independently calibrated de…

Black hole physics ; Individual stars ; Cyg X-1 ; Gamma rays ; X-rays observations ; BinariesAstrophysics::High Energy Astrophysical PhenomenaPhase (waves)FOS: Physical sciencesFlux02 engineering and technologyAstrophysicsUNESCO::ASTRONOMÍA Y ASTROFÍSICAAstrophysicsCyg X-101 natural sciencesOmegaSpectral lineIonizationIndividual stars0103 physical sciencesOptical depth (astrophysics)0202 electrical engineering electronic engineering information engineeringCalibration010303 astronomy & astrophysicsOptical depthPhysics010308 nuclear & particles physicsGamma raysBinariesAstrophysics (astro-ph)X-rays observationsGamma rayAstronomyAstronomy and Astrophysics020206 networking & telecommunicationsBlack hole physics:ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia [UNESCO]CoronaSpace and Planetary ScienceReflection (physics)020201 artificial intelligence & image processingUNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia:ASTRONOMÍA Y ASTROFÍSICA [UNESCO]AIP Conference Proceedings
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The pre-outburst flare of the A 0535+26 August/September 2005 outburst

2008

We study the spectral and temporal behavior of the High Mass X-ray Binary A 0535+26 during a `pre-outburst flare' which took place ~5 d before the peak of a normal (type I) outburst in August/September 2005. We compare the studied behavior with that observed during the outburst. We analyse RXTE observations that monitored A 0535+26 during the outburst. We complete spectral and timing analyses of the data. We study the evolution of the pulse period, present energy-dependent pulse profiles both at the initial pre-outburst flare and close to outburst maximum, and measure how the cyclotron resonance-scattering feature (hereafter CRSF) evolves. We present three main results: a constant period P=…

Astrophysics::High Energy Astrophysical PhenomenaX-ray binarymagnetic fields [Stars]FOS: Physical sciencesChamp magnetiqueAstrophysicsPhoton energyAstrophysicslaw.inventionPulse periodAccretion disclaw:ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia::Fuentes de Rayos X [UNESCO]X-rays : binaries; Stars : magnetic fields; Stars : individual : A 0535+26UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia::Fuentes de Rayos XAstrophysics::Solar and Stellar AstrophysicsSpectral analysisPhysicsAstrophysics (astro-ph)Astronomy and AstrophysicsSpace and Planetary ScienceHigh massbinaries [X-rays]individual : A 0535+26 [Stars]UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia::EstrellasFlare:ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia::Estrellas [UNESCO]
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