Publications (130)
Magnetic layers and neutral points near rotating black hole
V. Karas, O. Kopacek
Prospects of 3D mapping of the Galactic Centre clouds with X-ray polarimetry
F. Marin, V. Karas, D. Kunneriath +1
LOFT: the Large Observatory For X-ray Timing
M. Feroci, J. W. den Herder, E. Bozzo +245
Monitoring the Dusty S-Cluster Object (DSO/G2) on its Orbit towards the Galactic Center Black Hole
M. Valencia-S., A. Eckart, M. Zajacek +23
Power density spectra of modes of orbital motion in strongly curved spacetime: obtaining the observable signal
P. Bakala, G. Torok, V. Karas +8
Thermal disc emission from a rotating black hole: X-ray polarization signatures
M. Dovciak, F. Muleri, R. W. Goosmann +2
X-ray Variability of Active Galactic Nuclei and the Flare Model
R. W. Goosmann, B. Czerny, A. -M. Dumont +4
Evidence for a relativistic iron line in GRS 1915+105
A. Martocchia, G. Matt, V. Karas +2
Monitoring the Galactic Centre with Australia Telescope Compact Array
A. Borkar, A. Eckart, C. Straubmeier +12
Polarized light from Sgr A* in the near-infrared $K_{s}$-band
B. Shahzamanian, A. Eckart, M. Valencia-S. +13
Strong-gravity effects acting on polarization from orbiting spots
V. Karas
Failed radiatively Accelerated Dusty Outflow model of the Broad Line Region in Active Galactic Nuclei. I. Analytical solution
B. Czerny, Yan-Rong Li, K. Hryniewicz +6
Probing the Galactic center with X-ray polarimetry
F. Marin, V. Karas, D. Kunneriath +2
Relativistic spectral features from X-ray illuminated spots and the measure of the black hole mass in AGN
M. Dovciak, S. Bianchi, M. Guainazzi +2
The Large Observatory For x-ray Timing
M. Feroci, J. W. den Herder, E. Bozzo +341
On highly eccentric stellar trajectories interacting with a self-gravitating disc in Sgr A*
L. Subr, V. Karas
Coordinated multi-wavelength observations of Sgr A*
A. Eckart, R. Schoedel, F. K. Baganoff +26
Light curve of a source orbiting around a black hole: A fitting-formula
V. Karas
Emission Line Profiles from Self-Gravitating Thin Disks
V. Karas, A. Lanza, D. Vokrouhlicky
Light bending scenario for accreting black holes in X-ray polarimetry
M. Dovciak, F. Muleri, R. W. Goosmann +2
The model constraints from the observed trends for the quasi-periodic oscillation in RE J1034+396
B. Czerny, P. Lachowicz, M. Dovciak +3
The structure and radiation spectra of illuminated accretion disks in AGN. II. Flare/spot model of X-ray variability
B. Czerny, A. Rozanska, M. Dovciak +2
Polarization signatures of strong gravity in black-hole accretion discs
V. Karas, M. Dovciak, G. Matt
Coordinated mm/sub-mm observations of Sagittarius A* in May 2007
D. Kunneriath, A. Eckart, S. Vogel +26
Accretion, ejection and reprocessing in supermassive black holes
A. De Rosa, S. Bianchi, M. Giroletti +35
Charged tori in spherical gravitational and dipolar magnetic fields
P. Slany, J. Kovar, Z. Stuchlik +1
A relativistically smeared spectrum in the neutron star X-ray Binary 4U 1705-44: Looking at the inner accretion disc with X-ray spectroscopy
T. Di Salvo, A. D'Ai', R. Iaria +9
Plunging neutron stars as origin of organised magnetic field in galactic nuclei
V. Karas, O. Kopacek, D. Kunneriath +4
Light and shadow in the Galactic Center - On the detection of the relativistic periastron shift of star S2 in the Galactic Center
A. Eckart, M. Parsa, E. Mossoux +11
The Multifrequency Behavior of Sagittarius A*
A. Eckart, M. Zajacek, M. Parsa +15
Magnetic neutral points and electric lines of force in strong gravity of a rotating black hole
V. Karas, O. Kopacek, D. Kunneriath
Poincare ball embeddings of the optical geometry
M. Abramowicz, I. Bengtsson, V. Karas +1
Stellar dynamics in a galactic centre surrounded by a massive accretion disc. I. Newtonian description
D. Vokrouhlicky, V. Karas
Variation in the primary and reprocessed radiation from an orbiting spot around a black hole
M. Dovciak, V. Karas, G. Matt +1
Orbital decay of satellites crossing an accretion disc
V. Karas, L. Subr
Inducing chaos by breaking axial symmetry in a black hole magnetosphere
O. KopáÄek, V. Karas
Multi-phase environment of compact galactic nuclei: the role of the Nuclear Star Cluster
A. RóżaÅska, D. Kunneriath, B. Czerny +2
A self-consistent approach to the hard and soft states of 4U 1705-44
A. D'Aì, T. Di Salvo, D. Ballantyne +10
Near-infrared polarimetry setting constraints on the orbiting spot model for Sgr A* flares
L. Meyer, A. Eckart, R. Schoedel +4
Polarized NIR and X-ray Flares from SgrA*
A. Eckart, F. K. Baganoff, M. Zamaninasab +18
Flares from spiral waves by lensing and time-delay amplification?
V. Karas, M. Dovciak, A. Eckart +1
Role of emission angular directionality in spin determination of accreting black holes with broad iron line
J. Svoboda, M. Dovciak, R. W. Goosmann +1
The relativistic shift of narrow spectral features from black-hole accretion discs
T. Pechacek, M. Dovciak, V. Karas +1
The infrared K-band identification of the DSO/G2 source from VLT and Keck data
Andreas Eckart, M. Horrobin, S. Britzen +24
The Galactic centre mini-spiral in the mm-regime
D. Kunneriath, A. Eckart, S. N. Vogel +10
Polarization of light from warm clouds above an accretion disk: effects of strong-gravity near a black hole
J. Horak, V. Karas
Reflection nebulae in the Galactic Center: the case for soft X-ray imaging polarimetry
F. Marin, F. Muleri, P. Soffitta +2
Theoretical aspects of relativistic spectral features
V. Karas
Doppler tomography of relativistic accretion disks
V. Karas, P. Kraus
QPO in RE J1034+396: model constraints from observed trends
B. Czerny, P. Lachowicz, M. Dovciak +3
An orbiter crossing an accretion disc
L. Subr, V. Karas
Black holes in sources with a periodic component of variability
V. Karas, O. Semerak, F. de Felice
Pseudo-Newtonian models of a rotating black hole field
O. Semerak, V. Karas
Variable line profiles due to non-axisymmetric patterns in an accretion disc around a rotating black hole
V. Karas, A. Martocchia, L. Subr
On the role of strong gravity in polarization from scattering of light in relativistic flows
J. Horak, V. Karas
Stellar capture by an accretion disc
D. Vokrouhlicky, V. Karas
The structure and X-ray radiation spectra of illuminated accretion disks in AGN. III. Modeling fractional variability
R. W. Goosmann, B. Czerny, M. Mouchet +5
Radio Quiet AGN
B. Czerny, R. Goosmann, V. Karas +1
X-ray Reverberation Observational Modelling in Active Galactic Nuclei
M. D. Caballero-Garcia, M. Dovciak, M. Bursa +2
The instrumental polarization of the Nasmyth focus polarimetric differential imager NAOS/CONICA (NACO) at the VLT - Implications for time-resolved polarimetric measurements of Sgr A*
G. Witzel, A. Eckart, R. M. Buchholz +9
Similarity of the variability patterns in the Exosat and Ginga folded light curves of the Seyfert galaxy NGC 6814
M. A. Abramowicz, G. Bao, V. Karas +1
Region of magnetic dominance near a rotating black hole
V. Karas, M. Dovciak
An ADAF in the Kerr metric: propagation of a wave pattern
T. Musil, V. Karas
Near infrared flares of Sagittarius A*: Importance of near infrared polarimetry
M. Zamaninasab, A. Eckart, G. Witzel +11
Black holes and magnetic fields
J. Bicak, V. Karas, T. Ledvinka
Electrically charged matter in permanent rotation around magnetized black hole: A toy model for self-gravitating fluid tori
A. Trova, V. Karas, P. Slany +1
Oblique magnetic fields and the role of frame dragging near rotating black hole
V. Karas, O. Kopacek, D. Kunneriath +1
Iron Line Diagnostics for the GRS 1915+105 Black Hole
A. Martocchia, G. Matt, V. Karas +2
The Galactic Center as a Paradigm for Low Luminosity Nuclei? The K-band identification of the DSO/G2 source from VLT and Keck data
Andreas Eckart, S. Britzen, M. Horrobin +27
Magnetic fields around black holes
Z. Budinova, M. Dovciak, V. Karas +1
Hot-spot model for accretion disc variability as random process
T. Pechacek, V. Karas, B. Czerny
Non-linear resonance in nearly geodesic motion in low-mass X-ray binaries
M. A. Abramowicz, V. Karas, W. Kluzniak +2
KYNREFREV - implementation of an X-ray reverberation model in XSPEC
M. D. Caballero-Garcia, M. Dovciak, I. Papadakis +4
Spectral Analysis of 1H0707-495 with XMM-Newton
T. Dauser, J. Svoboda, N. Schartel +6
Black hole accretion rings revealed by future X-ray spectroscopy
V. Sochora, V. Karas, J. Svoboda +1
A cloud model of active galactic nuclei: the iron K-alpha line diagnostics
V. Karas, B. Czerny, Z. Abrassart +1
Retro-lensing light curves near a black hole
V. Karas
Variation of the primary and reprocessed radiation in the flare-spot model
M. Dovciak, V. Karas, G. Matt +1
Source-intrinsic near-infrared properties of Sgr A*: Total intensity measurements
G. Witzel, A. Eckart, M. Bremer +12
Conditions for the Thermal Instability in the Galactic Centre Mini-spiral region
A. RóżaÅska, B. Czerny, D. Kunneriath +3
Influence of frame-dragging on magnetic null points near rotating black hole
V. Karas, O. Kopacek, D. Kunneriath
Frame-dragging effects on magnetic fields near a rotating black hole
V. Karas, O. Kopacek, D. Kunneriath
Gravitating discs around black holes
V. Karas, J. -M. Hure, O. Semerak
Interior potential of a toroidal shell from pole values
J. -M. Huré, A. Trova, V. Karas +11
Simultaneous NIR/sub-mm observation of flare emission from SgrA*
A. Eckart, R. Schoedel, M. Garcia-Marin +28
K-band polarimetry of an Sgr A* flare with a clear sub-flare structure
L. Meyer, R. Schoedel, A. Eckart +3
Fourier-phase analysis of the orbiting bright-spot model for AGN variability
V. Karas
Equilibrium configurations of charged fluid around Kerr black hole
A. Trova, K. Schroven, E. Hackmann +3
A method to determine the parameters of black holes in AGNs and galactic X-ray sources with periodic modulation of variability
O. Semerak, F. de Felice, V. Karas
On the runaway instability of relativistic tori
M. A. Abramowicz, V. Karas, A. Lanza
Investigating the Relativistic Motion of the Stars Near the Supermassive Black Hole in the Galactic Center
M. Parsa, A. Eckart, B. Shahzamanian +4
Enhanced activity of massive black holes by stellar capture assisted by a self-gravitating accretion disc
V. Karas, L. Subr
Interaction between stars and an inactive accretion disc in a galactic core
V. Karas, L. Subr
Magnetic flares in Active Galactic Nuclei: Modeling the iron Kalpha-line
R. W. Goosmann, B. Czerny, M. Mouchet +5
First results from the use of the relativistic and slim disc model SLIMULX in XSPEC
M. D. Caballero-Garcia, M. Bursa, M. Dovciak +3
Modeling the X-ray fractional variability spectrum of Active Galactic Nuclei using multiple flares
R. W. Goosmann, M. Dovciak, V. Karas +3
Of NBOs and kHz QPOs: a low-frequency modulation in resonant oscillations of relativistic accretion disks
J. Horak, M. Abramowicz, V. Karas +1
On the Prospect of Constraining Black-Hole Spin Through X-ray Spectroscopy of Hotspots
K. D. Murphy, T. Yaqoob, M. DovÄiak +1
Bright X-ray flares from Sgr A*
G. D. Karssen, M. Bursa, A. Eckart +4
Theoretical modelling of the AGN iron-line vs continuum time-lags in the lamp-post geometry
A. Epitropakis, I. E. Papadakis, M. DovÄiak +4