Gravitační pole a družicové metody (od prvního sputniku k družicovému gradientometru)
Kostelecký, J.; Klokočník, Jaroslav
2002 - Czech Keywords: gravitational field Available at various institutes of the ASCR Gravitační pole a družicové metody (od prvního sputniku k družicovému gradientometru)

Kostelecký, J.; Klokočník, Jaroslav
Astronomický ústav, 2002

Long-term activity of the X-ray source QR And / RX J0019.8+2156
Šimon, Vojtěch; Sobotka, P.; Marek, P.; Lehký, M.; Šmelcer, L.; Lomoz, Fr.
2002 - English QR And has been monitored in the framework of the observational campaing which started in 1998. The authors resolved prominent variations of the orbital modulation which depend on the state of the long-term activity of the system. Keywords: X-ray sources; circumstellar matter; cataclysmic variables Available at various institutes of the ASCR Long-term activity of the X-ray source QR And / RX J0019.8+2156

QR And has been monitored in the framework of the observational campaing which started in 1998. The authors resolved prominent variations of the orbital modulation which depend on the state of the ...

Šimon, Vojtěch; Sobotka, P.; Marek, P.; Lehký, M.; Šmelcer, L.; Lomoz, Fr.
Astronomický ústav, 2002

Long-term variability of dwarf novae and soft X-ray transients
Šimon, Vojtěch
2002 - English The results of analysis of Tc by the method of the O-C residuals is presented for a set of DN of various types and some SXTs. Keywords: X-ray sources; circumstellar matter; cataclysmic variables Available at various institutes of the ASCR Long-term variability of dwarf novae and soft X-ray transients

The results of analysis of Tc by the method of the O-C residuals is presented for a set of DN of various types and some SXTs.

Šimon, Vojtěch
Astronomický ústav, 2002

Role profesora Buchara v astrometrii aneb od cirkumzenitálu k Hipparcosu
Vondrák, Jan
2002 - Czech Keywords: astrometry Available at various institutes of the ASCR Role profesora Buchara v astrometrii aneb od cirkumzenitálu k Hipparcosu

Vondrák, Jan
Astronomický ústav, 2002

Some aspects of meteor head echos occurrence during Leonids 2000 and 2001
Nováková, Drahomíra; Pecina, Petr
2002 - English Keywords: head echoes; Leonids Available at various institutes of the ASCR Some aspects of meteor head echos occurrence during Leonids 2000 and 2001

Nováková, Drahomíra; Pecina, Petr
Astronomický ústav, 2002

Modernization of the HSFA solar instruments at the OndĹejov Observatory of the Astronomical institute of the Academy of sciences of the Czech republic
Klvaňa, Miroslav; Bumba, Václav; Halík, M.; Ulrich, J.; Chvojka, M.
2001 - Czech The two horizontal solar telescopes with spectrographs HSFA at the OndĹejov observatory are modernized for exploitation of both their spectrographs as for the photographic observations, as well as for the registration of spectra with the CCD cameras or photomultipliers. The conception of the reconstruction, emphasizing the new possibilities of both instruments is discussed. Dva horizontální sluneční pĹístroje ondĹejovské observatoĹe Astronomického ústavu AV ČR jsou modernizovány pro využití jak fotografická, tak zejména CCD kamer, a to s vysokým stupněm automatizace. Je diskutována koncepce rekonstrukce. Keywords: solar horizontal telescope; spectrograph Available at various institutes of the ASCR Modernization of the HSFA solar instruments at the OndĹejov Observatory of the Astronomical institute of the Academy of sciences of the Czech republic

The two horizontal solar telescopes with spectrographs HSFA at the OndĹejov observatory are modernized for exploitation of both their spectrographs as for the photographic observations, as well as for ...

Klvaňa, Miroslav; Bumba, Václav; Halík, M.; Ulrich, J.; Chvojka, M.
Astronomický ústav, 2001

Spectroscopic study of omicron And
Budovičová, Andrea
2001 - English Keywords: Be stars; o And; Be hvězdy Available at various institutes of the ASCR Spectroscopic study of omicron And

Budovičová, Andrea
Astronomický ústav, 2001

Solar activity as a consequence of the solar system origin
Čech, J.; Kotrč, Pavel; Křivský, L.; Klimeš, J.
2001 - Czech A similarity of the orbital periods of planets and those iccuring in the solar activity is discussed. Je diskutována podobnost délky oběhu planet a trvání period sluneční aktivity. Keywords: solar system; sun; solar activity Available at various institutes of the ASCR Solar activity as a consequence of the solar system origin

A similarity of the orbital periods of planets and those iccuring in the solar activity is discussed.

Čech, J.; Kotrč, Pavel; Křivský, L.; Klimeš, J.
Astronomický ústav, 2001

Methodology of the search of rapid changes of the H-alpha chromosphere brightness
Kupryakov, Yu. A.; Kotrč, Pavel; Havlíčková, E.
2001 - Czech Methodology of searching fast changes in the chromosphere H-alpha brightness during solar flares is discussed. Je diskutován základ metodiky hledání korelací v rychlých změnách jasu chromosféry pĹi sluneční erupci. Keywords: Sun; solar activity; flares; h-alpha; changes Available at various institutes of the ASCR Methodology of the search of rapid changes of the H-alpha chromosphere brightness

Methodology of searching fast changes in the chromosphere H-alpha brightness during solar flares is discussed.

Kupryakov, Yu. A.; Kotrč, Pavel; Havlíčková, E.
Astronomický ústav, 2001

Formation of eccentric disks around black holes
Hadrava, Petr; Řezáč, R.; Oestgaard, E.
2001 - English The formation and evolution of eccentric disks around black holes due to explosion of a companion on an eccetric orbit is modeled by means of exact general-relativistic N-particle treatment. It is shown that in spite of the generally accepted view that the debris must be quickly smeared out to a circular accretion disk. Keywords: black holes; accretion disks; eccentric rings Available at various institutes of the ASCR Formation of eccentric disks around black holes

The formation and evolution of eccentric disks around black holes due to explosion of a companion on an eccetric orbit is modeled by means of exact general-relativistic N-particle treatment. It is ...

Hadrava, Petr; Řezáč, R.; Oestgaard, E.
Astronomický ústav, 2001