Search Publications
Comparison of Gaia BP/RP spectra with LDS (Low Dispersion Spectroscopy) photographic sky surveys
Hudec, R.
Blue (BP) and Red (RP) Photometer low-resolution spectral data is one of the exciting new products in the third data release of ESA satellite Gaia (Gaia DR3) https://gaia.aip.de/cms/services/spectra-access/. The Gaia "photometric mode" RP/BP generates ultra-low-dispersion prism spectra of celestial sources. The LDS (Low-Dispersion Spectroscopy) as…
Long term follow-up coverage of Gaia photometric alert sources by Ondrejov robotic telescopes
Jelínek, M.; Štrobl, J.; Hudec, R.
The robotic telescopes at the Ondrejov Observatory are providing long-term optical multi-color coverage for selected 25 Gaia alert triggers located in the northern sky hemisphere. I will present and briefly discuss examples of selected results, mostly unpublished, obtained with these devices. In addition to that, I will present and discuss the pot…
Distance determination by magnitude analysis of some open clusters with GAIA era and stellar luminosity function
Elsanhoury, W. H.; Haroon, A. A.; Al-Johani, Amnah S. +1 more
In this work, we carry out by utilizing the distance equation with providing some basic descriptive statistics for both apparent and absolute magnitudes, the distances of some open clusters (i.e., Hyades, Pleiades, IC 2391, Koposov 12, Koposov 43, NGC 1348, NGC 2112, NGC 4337, SAI 24, and SAI 94) with the assumption that all members N are scatteri…
Asteroseismology of the heartbeat star KIC 5006817
Merc, J.; Sánchez Arias, J. P.; Beck, P. G. +2 more
This paper summarizes the project work on asteroseismology at the ERASMUS+ GATE 2020 Summer school on space satellite data. The aim was to do a global asteroseismic analysis of KIC 5006817, and quantify its stellar properties using the high-quality, state of the art space missions data. We employed the aperture photometry to analyze the data from …
Flare stars in nearby Galactic open clusters based on TESS data
Baratella, M.; Vida, K.; Maryeva, O. +3 more
The study is devoted to search for flare stars among confirmed members of Galactic open clusters using high-cadence photometry from TESS mission. We analyzed 957 high-cadence light curves of members from 136 open clusters. As a result, 56 flare stars were found, among them 8 hot B-A type objects. Of all flares, 63 % were detected in sample of cool…
V355 And: a neglected detached binary in a multiple star system
Özkardeş, B.
The analysis of light curves (from TESS, ASAS--SN and KWS databases) of the eclipsing binary V355 And is presented for the first time. The O-C diagram was constructed using all available times of minimum light together with the ones determined in this study, and the revised ephemeris was obtained. The final photometric model describes V355 And as …
Improving light curve parameters of exoplanets based on TESS data
Parviainen, H.; Maliuk, A.; Vítková, M. +1 more
We revise parameters of four transiting hot Jupiter planets discovered by ground-based surveys. We use follow-up observations carried by TESS mission together with PyTransit software. Space telescopes like TESS provide better coverage and photometry precision than ground-based telescopes. PyTransit is fast and user-friendly exoplanet transit light…
Photometric and period analysis of the eclipsing binary system V2783 Ori
Bulut, İ.; Bulut, A.
In this study we performed the first detailed photometric and period analysis of the recently discovered eclipsing binary star V2783 Ori. The analysis of the light curve has shown that the system is in a detached configuration, with the orbital eccentricity e = 0.274 ± 0.008. The photometric mass ratio of V2783 Ori determined from the light curve …
The GATE summer school
Paunzen, E.; Skarka, M.; Janík, J. +1 more
The education activities in the form of short and condensed courses such as summer schools are essential parts of the educational process of every scientist. Here we briefly describe the program and the organization of the GATE summer school that was held in a form of virtual meeting between August 8 and 15 in Brno, Czech Republic.
Eclipsing binaries in the era of Gaia
Holl, B.; Mowlavi, N.; Lecoeur-Taïbi, I. +3 more
The ESA mission Gaia is expected to detect a few million eclipsing binaries, most of them hitherto unknown. We present an outline of the processing of these objects in the Gaia Data Processing and Analysis Consortium pipeline, with an emphasis on the scientific validation of the software components.