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High variability in Vela X-1: giant flares and off states
Ingo Kreykenbohm, Joern Wilms, Peter Kretschmar +6
We investigate the spectral and temporal behavior of the high mass X-ray binary Vela X-1 during a phase of high activity, with special focus on the observed giant flares and off st…
INTEGRAL long-term monitoring of the Supergiant Fast X-ray Transient XTE J1739-302
P. Blay, S. Martínez-Núñez, I. Negueruela +6
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…
INTEGRAL observations of the variability of OAO 1657-415
J. Barnstedt, R. Staubert, A. Santangelo +7
The Galactic Plane Scan (GPS) was one of the core observation programmes of the INTEGRAL satellite. The highly variable accreting pulsar OAO 1657-415 was frequently observed within…
Pulse phase resolved analysis of the HMXB Cen X-3 over two binary orbits
S. Suchy, K. Pottschmidt, J. Wilms +7
We present a detailed analysis of observations of the high mass X-ray binary Cen X-3 spanning two consecutive binary orbits performed with the RXTE satellite in early March 1997. T…
A model for cyclotron resonance scattering features
G. Schönherr, J. Wilms, P. Kretschmar +5
(abbreviated version of the abstract) We study the physics of cyclotron line formation in the high-energy spectra of accreting X-ray pulsars using Monte Carlo methods, assuming tha…
Correlated radio--X-ray variability of Galactic Black Holes: A radio--X-ray flare in Cygnus X-1
Joern Wilms, Katja Pottschmidt, Guy G. Pooley +4
We report on the first detection of a quasi-simultaneous radio-X-ray flare of Cygnus X-1. The detection was made on 2005 April 16 with pointed observations by the Rossi X-ray Timin…