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Long term variability of Cygnus X-1. I. X-ray spectral-temporal correlations in the hard state
- K. Pottschmidt, J. Wilms, Ucb
- Physics
- 13 February 2002
We present the long term evolution of the timing properties of the black hole candidate Cygnus X-1 in the 0.002-128 Hz frequency range as monitored from 1998 to 2001 with the Rossi X-ray Timing…
Polarized Gamma-Ray Emission from the Galactic Black Hole Cygnus X-1
- P. Laurent, J. Rodriguez, J. Wilms, M. Cadolle Bel, K. Pottschmidt, V. Grinberg
- PhysicsScience
- 21 April 2011
TLDR
Modulated High-Energy Gamma-Ray Emission from the Microquasar Cygnus X-3
- A. Abdo, M. Ackermann, M. Ziegler
- PhysicsScience
- 11 December 2009
TLDR
High variability in Vela X-1: giant flares and off states
- I. Kreykenbohm, J. Wilms, R. Staubert
- Physics
- 16 October 2008
Aims. 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 states.…
The causal connection between disc and power-law variability in hard state black hole X-ray binaries
- P. Uttley, T. Wilkinson, M. Boeck
- Physics
- 4 April 2011
We use the XMM–Newton EPIC-pn instrument in timing mode to extend spectral time-lag studies of hard state black hole X-ray binaries into the soft X-ray band. We show that variations of the disc…
A good long look at the black hole candidates LMC X-1 and LMC X-3
- M. Nowak, J. Wilms, Cu Boulder
- Physics
- 24 May 2000
ABSTRA C T LMC X-1 and LMC X-3 are the only known persistent stellar-mass black-hole candidates that have almost always shown spectra that are dominated by a soft, thermal component. We present here…
Long term variability of Cygnus X-1 - IV. Spectral evolution 1999–2004
- J. Wilms, M. Nowak, Iaa Tuebingen
- Physics
- 6 October 2005
Continuing the observational campaign initiated by our group, we present the long term spectral evolution of the Galactic black hole candidate Cygnus X-1 in the X-rays and at 15 GHz. We present ∼200…
Soft-to-Hard State Transitions in LMC X-3
ABSTRA C T We present the analysis of the approximately three-year long Rossi X-ray Timing Explorerd (RXTE) campaign for monitoring the canonical soft state black-hole candidates LMC X-1 and LMC X-3.…
Long term variability of Cygnus X-1 - III. Radio–X-ray correlations
- T. Gleißner, J. Wilms, U. Amsterdam
- Physics
- 3 July 2004
Long time scale radio-X-ray correlations in black holes during the hard state have been found in many sources and there seems to emerge a universal underlying relationship which quantitatively…
Long term variability of Cygnus X-1. VI. Energy-resolved X-ray variability 1999-2011
- V. Grinberg, K. Pottschmidt, J. Wilms
- Physics
- 18 February 2014
We present the most extensive analysis of Fourier-based X-ray timing properties of the black hole binary Cygnus X-1 to date, based on 12 years of bi-weekly monitoring with RXTE from 1999 to 2011. Our…
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