101 citations
- Charles UniversityCZ3 papers
- Masaryk UniversityCZ3 papers
- Astronomical Institute of the Slovak Academy of SciencesSK2 papers
- Czech Academy of Sciences, Astronomical InstituteCZ2 papers
- Aryabhatta Research Institute of Observational SciencesIN1 paper
- Astronomical Observatory of CapodimonteIT1 paper
- Astronomical Observatory of RomeIT1 paper
- Boston UniversityUS1 paper
- Center for Astrophysics Harvard & SmithsonianUS1 paper
- Centre National de la Recherche ScientifiqueFR1 paper
- Crimean Astrophysical ObservatoryUA1 paper
- Czech Academy of SciencesCZ1 paper
5 papers · 1 filter
A new activity phase of the blazar 3C 454.3. Multifrequency observations by the WEBT and XMM-Newton in 2007-2008
C. M. Raiteri, M. Villata, V. M. Larionov +2
We present and analyse the WEBT multifrequency observations of 3C 454.3 in the 2007-2008 observing season, including XMM-Newton observations and near-IR spectroscopic monitoring, a…
Eclipsing Binaries with Possible Light-Time Effect
Zasche Petr, Zejda Miloslav, Brat Lubos
The period changes of six eclipsing binaries have been studied with focus on the light-time effect. With the least squares method we also calculated parameters of such an effect an…
The possible orbital period of the nova V1493 Aquilae
Andrej Dobrotka, Michael Friedjung, Alon Retter +2
Period analysis of CCD photometry of V1493 Aql (Nova Aql 1999 no. 1) performed during 12 nights through I and R filters a few weeks after maximum is presented. The PDM method for p…
Light Variations of the Anomalous Central Star of Planetary Nebula Sh 2-71
Zdenek Mikulasek, Augustin Skopal, Miloslav Zejda +5
We present an analysis of light variations in UBVRI of the anomalous object in the center of planetary nebula Sh 2-71. We refined the linear ephemeris of the light maxima to JD{max…
Preliminary analysis of photometric variations of central star of planetary nebula Sh 2-71
Zdenek Mikulasek, Lubos Kohoutek, Miloslav Zejda +1
We confirmed the presence of regular UBVRIc light variations of the object in the centre of planetary nebula Sh 2-71, the improved period of them being P =(68.132+/-0.005) days. Th…