Gabriel Szász

Masaryk University | MUNI · Department of Theoretical Physics and Astrophysics

We outline the impact of a small two-band UV-photometry satellite mission on the field of stellar physics, magnetospheres of stars, binaries, stellar clusters, interstellar matter, and exoplanets. On specific examples of different types of stars and stellar systems, we discuss particular requirements for such a satellite mission in terms of specifi...

We outline the impact of a small two-band UV-photometry satellite mission on the field of stellar physics, magnetospheres of stars, binaries, stellar clusters, interstellar matter, and exoplanets. On specific examples of different types of stars and stellar systems, we discuss particular requirements for such satellite missions in terms of specific...

We present a near-UV space telescope on a ∼70kg micro-satellite with a moderately fast repointing capability and a near real-time alert communication system that has been proposed in response to a call for an ambitious Czech national mission. The mission, which has recently been approved for Phase 0, A, and B1 study shall measure the brightness evo...

We present a near-UV space telescope on a ~70kg micro-satellite with a moderately fast repointing capability and a near real-time alert communication system that has been proposed in response to a call for an ambitious Czech national mission. The mission, which has recently been approved for Phase 0, A, and B1 study shall measure the brightness evo...

We present new progress in our extensive project mCPod (On-line database of photometric observations of magnetic CP stars), which was initiated five and a half years ago (Mikulásek et. al, 2007). The nascent database that contains now more than 215 thousand photometric measurements of the most important 157 mCP stars will be continuously supplement...

Magnetic chemically peculiar (mCP) stars of the upper part of the main sequence usually exhibit strictly periodic variations of their light, spectrum and magnetic field. These changes can be well explained using the oblique rotator model of the rigidly rotating star with persistent photometric spots, uneven horizontal abundance of chemical elements...

V Sge is a luminous supersoft X-ray source that has been receiving outstanding attention from various researchers since 1965. However, the mechanism of the most remarkable light changes called large outbursts still remains unexplained. Thanks to new CCD equipment at the Hlohovec Observatory we were able to do the first steps in order to discover th...

CCD photometry of QR And obtained in 2004 is reported. The lightcurves show changes in overall brightness on timescale of a week in range of ~0.30 mag, contrary to recently published results ~0.15 mag. With our data set we improved the orbital period and construct the first (O-C) diagrams.

New quadratic orbital elements of V Sge are presented. These was computed using 14 minima timings obtained in 2004. During this photometric campaing, the star was undergoing large outburst, which was measured in detail using CCD.

We present 180 CCD and photoelectric times of minima of selected close eclipsing binaries.

The paper is devoted to the description of methodology for variability determination of point light source, as well as to data reduction and anlysis of data to obtain basic physical chracteristics of discovered variable stars. We characterize basic photometric behavior of new variables discovered by our group in the fileds of BX Pegasi and V Sagitt...