534 citations
- Czech Academy of Sciences, Astronomical InstituteCZ98 papers
- Slovak Academy of SciencesSK48 papers
- Charles UniversityCZ46 papers
- Centre National de la Recherche ScientifiqueFR41 papers
- Eötvös Loránd UniversityHU38 papers
- Polish Academy of SciencesPL31 papers
- Center for Astrophysics Harvard & SmithsonianUS30 papers
- Institute of Physics of the Slovak Academy of SciencesSK30 papers
- University of ViennaAT29 papers
- Brno University of TechnologyCZ28 papers
- Hiroshima UniversityJP28 papers
- Konkoly ObservatoryHU28 papers
8 papers · 2 filters
X-ray eruptions every 22 days from the nucleus of a nearby galaxy
Muryel Guolo, Dheeraj R. Pasham, Michal Zajaček +15
Galactic nuclei showing recurrent phases of activity and quiescence have recently been discovered, with recurrence times as short as a few hours to a day -- known as quasi-periodic…
Precession-induced Variability in AGN Jets and OJ 287
Silke Britzen, Michal Zajaček, Gopal-Krishna +5
The combined study of the flaring of Active Galactic Nuclei (AGN) at radio wavelengths and pc-scale jet kinematics with Very Long Baseline Interferometry (VLBI) has led to the view…
Discovery of extraordinary X-ray emission from magnetospheric interaction in the unique binary stellar system Lupi
B. Das, V. Petit, Y. Nazé +12
We report detailed X-ray observations of the unique binary system Lupi, the only known short-period binary consisting of two magnetic early-type stars. The components have comp…
Spectral Energy Distribution profiles from AGN accretion disc in multi-gap setup
Marcel Štolc, Michal Zajaček, Bożena Czerny +1
Spectral Energy Distribution (SED) of the broad-band continuum emission from black-hole accretion discs can serve as a tool to measure parameters of the central body and constrain…
Particle-in-cell simulations of electron-positron cyclotron maser forming pulsar radio zebras
M. Labaj, J. Benáček, M. Karlický
The microwave radio dynamic spectra of the Crab pulsar interpulse contain fine structures represented via narrowband quasiharmonic stripes. The pattern significantly constrains any…
The peak-flux of GRB 221009A measured with GRBAlpha
Jakub Ripa, Hiromitsu Takahashi, Yasushi Fukazawa +42
The brightest gamma-ray burst ever observed, long-duration GRB 221009A, was detected by GRBAlpha nano-satellite without saturation. We present light curves of the prompt emission i…