K. Pottschmidt

Publications462
h-index46
Citations5,877
Highly Influential Citations475
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Long term variability of Cygnus X-1. I. X-ray spectral-temporal correlations in the hard state
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
TLDR
This gamma-ray emission originates from a jet of relativistic particles that is formed in close proximity to the black hole, and is measured with the International Gamma-Ray Astrophysics Laboratory Imager on Board the Integral Satellite (INTEGRAL/IBIS) telescope.
Modulated High-Energy Gamma-Ray Emission from the Microquasar Cygnus X-3
TLDR
The Fermi Large Area Telescope has detected a variable high-energy source coinciding with the position of the x-ray binary and microquasar Cygnus X-3, opening new areas in which to study the formation of relativistic jets.
High variability in Vela X-1: giant flares and off states
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
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
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
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
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
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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