A5015335259- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Astrophysics and Star Formation Studies
- Astro and Planetary Science
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- History and Developments in Astronomy
- Medical and Biological Sciences
- Ophthalmology and Visual Health Research
- Glaucoma and retinal disorders
- Retinal and Optic Conditions
- Retinal Development and Disorders
- Astrophysics and Cosmic Phenomena
- Myeloproliferative Neoplasms: Diagnosis and Treatment
- Immunodeficiency and Autoimmune Disorders
- History of Medicine Studies
- Adaptive optics and wavefront sensing
- Chronic Lymphocytic Leukemia Research
- Occupational and environmental lung diseases
- Infrared Thermography in Medicine
- Multiple and Secondary Primary Cancers
- Optical Polarization and Ellipsometry
- Retinal Imaging and Analysis
- Ophthalmology and Visual Impairment Studies
University of Szeged
2015-2024
Eötvös József Főiskola
2002-2008
Astronomical Observatory
1999-2008
Instituto de Astrofísica de Canarias
2003
Konkoly Observatory
2001
Eötvös Loránd University
1948-1951
He Eye Hospital
1948
We produce and analyse eclipse time variation (ETV) curves for some 2600 Kepler binaries. find good to excellent evidence a third body in 222 systems via either the light-travel-time (LTTE) or dynamical effect delays. Approximately half of these have been discussed previous work, while rest are newly reported here. Via detailed analysis ETV using high-level analytic approximations, we able extract system masses information about three-dimensional characteristics triple 62 which exhibit both...
We present extensive optical ($UBVRI$, $g'r'i'z'$, and open CCD) near-infrared ($ZYJH$) photometry for the very nearby Type IIP SN ~2013ej extending from +1 to +461 days after shock breakout, estimated be MJD $56496.9\pm0.3$. Substantial time series ultraviolet spectroscopy obtained +8 +135 are also presented. Considering well-observed SNe literature, we derive $UBVRIJHK$ bolometric calibrations $UBVRI$ unfiltered measurements that potentially reach 2\% precision with a $B-V$ color-dependent...
In this work we report the discovery and analysis of six new compact triply eclipsing triple star systems found with TESS mission: TICs 37743815, 42565581, 54060695, 178010808, 242132789, 456194776. All these exhibit distinct third body eclipses where inner binary (EB) occults (`tertiary') star, or vice versa. We utilized photometry, archival photometric data, available spectral energy distribution curves (SED) to solve for properties all three stars, as well many orbital elements. describe...
Context . Since the discovery of first exoplanet almost three decades ago, number known exoplanets has increased dramatically. By beginning 2000s it was clear that dedicated facilities to advance our studies in this field were needed. The CHaracterising ExOPlanet Satellite (CHEOPS) is a space telescope specifically designed monitor transiting orbiting bright stars. In September 2023, CHEOPS completed its nominal mission duration 3.5 yr and remains excellent operational conditions. As...
HD 181068 is the brighter of two known triply eclipsing hierarchical triple stars in Kepler field. It has been continuously observed for more than 2 years with space telescope. Of nine quarters data, three have obtained short-cadence mode, that one point per 58.9 s. Here we analyse this unique dataset to determine absolute physical parameters (most importantly masses and radii) full orbital configuration using a sophisticated novel approach. We measure eclipse timing variations (ETVs), which...
ABSTRACT In this work, we report the independent discovery and analysis of nine new compact triply eclipsing triple star systems found with Transiting Exoplanet Survey Satellite (TESS) mission: TICs 47151245, 81525800, 99013269, 229785001, 276162169, 280883908, 294803663, 332521671, 356324779. Each these exhibits distinct third-body eclipses where third (‘tertiary’) occults inner binary (EB), or vice versa. We utilize a photodynamical TESS photometry, archival photometric data, eclipse...
In this paper we reanalyze the extended ETV curves of formerly identified triple star candidates and many other $Kepler$ EBs. Besides confirmations former findings and/or improvements systems' orbital properties, time-base allows us to identify several new, longer outer period systems, it also makes possible a more detailed study dynamical perturbations in tightest stars. We extend triples with those mid-eclipse times which can be deduced from TESS observations and, moreover, targeted...
A former analysis of eclipse timing variation (ETV) curves eclipsing binaries (EBs) observed by the Kepler spacecraft during its ∼4-year-long prime mission has led to discovery and characterization 221 hierarchical triple star system with different confidence levels. Although ended in 2013 (a little more than a decade ago), TESS space telescope revisited original field on several occasions between 2019 2024, thereby extending time base high-precision observations for substantially longer...
Research Articles| March 18 2010 Notes upon the Question of Hereditary Glaucoma Subject Area: Ophthalmology I. Biró From Eye Clinic No. 1, University Budapest Search for other works by this author on: This Site PubMed Google Scholar Ophthalmologica (1951) 122 (4): 228–238. https://doi.org/10.1159/000301064 Article history Published Online: Content Tools Views Icon contents Figures & tables Video Audio Supplementary Data Peer Review Share Facebook Twitter LinkedIn Email Get Permissions Cite...
ABSTRACT In this work we report the discovery and analysis of three new triply eclipsing triple star systems found with TESS mission during its observations northern skies: TICs 193993801, 388459317, 52041148. We utilized precision photometry binary eclipses third-body events, ground-based archival follow-up photometric data, eclipse timing variations, spectral energy distributions, as well theoretical evolution tracks in a joint photodynamical to deduce system masses orbital parameters both...
The nearby, bright, almost completely unreddened Type Ia supernova 2011fe in M101 provides a unique opportunity to test both the precision and accuracy of extragalactic distances derived from SNe light curve fitters. We apply current, public versions independent fitting codes MLCS2k2 SALT2 compute distance modulus SN high-precision, multi-color (BVRI) curves. results two confirm that is "normal" (not peculiar) only slightly reddened Ia. New moduli are as 29.21 +/- 0.07 mag (D ~ 6.95 0.23$...
Aims. We have identified nearly a hundred close triply eclipsing hierarchical triple star systems from data taken with the space telescope TESS. These are noteworthy in that we can potentially determine their dynamical and astrophysical parameters high precision. In present paper, report comprehensive study of seven new compact this larger sample: TICs 133771812, 176713425, 185615681, 287756035, 321978218, 323486857, 650024463. Methods. Most for come TESS observations, but two them Gaia...
KIC 8560861 (HD 183648) is a marginally eccentric (e = 0.05) eclipsing binary with an orbital period of Porb 31.973 d, exhibiting mmag amplitude pulsations on time-scales few days. We present the results complex analysis high- and medium-resolution spectroscopic data Kepler Q0 – Q16 long cadence photometry. The iterative combination spectral disentangling, atmospheric analysis, radial velocity eclipse timing variation studies, separation pulsational features light curve, curve led to...
SN 2013df is a nearby Type IIb supernova that seems to be the spectroscopic twin of well-known 1993J. Previous studies revealed many, but not all interesting properties this event. Our goal was add new understanding both early and late-time phases 2013df. spectral analysis based on 6 optical spectra obtained with 9.2m Hobby-Eberly Telescope during first month after explosion, complemented by near-infrared spectrum. We applied SYNAPPS synthesis code constrain chemical composition physical...
We report the discovery with $TESS$ of a third set eclipses from V994 Herculis (TIC 424508303), previously only known as doubly-eclipsing system. The key implication this and our analyses is that Her second fully-characterized (2+2) + 2 sextuple system, in which all three binaries eclipse. In work, we use combination ground-based observations data to analyze A B order update parameters inner quadruple's orbit (with derived period 1062 $\pm$ 2d). binary C were detected also found older...
Complex period variations of five W UMa type binaries (AB And, OO Aql, DK Cyg, V566 Oph, U Peg) were investigated by analyzing their O--C diagrams, and several common features found. Four the systems show secular at a constant rate on order |dP / dt 1/P | ~ 10E-7 1/yr. In case AB Peg high-amplitude, nearly one-century long quasi-sinusoidal pattern was also It might be explained as light-time effect, or some magnetic phenomena, although mathematical, consequently physical, parameters these...
We present the dynamic eclipse mapping method designed specifically to reconstruct surface intensity patterns of non-radial stellar oscillations on components eclipsing binaries. The needs a geometric model binary, accepts light curve and detected pulsation frequencies input, output yields estimates patterns, in form images, thus allowing direct identification mode numbers (ℓ, m). Since it has minimal modelling requirements can operate photometric observations arbitrary wavelength bands, is...
ABSTRACT We have found that the 2+2 quadruple star system BU CMi is currently most compact known, with an extremely short outer period of only 121 d. The previous record holder was TIC 219006972 (Kostov et al.), a 168 nature established by Volkov, Kravtsova & Chochol, but they misidentified as 6.6 yr. contains two eclipsing binaries (EBs), each near 3 d, and substantial eccentricity ≃0.22. All four stars are within ∼0.1 M⊙ 2.4 M⊙. Both exhibit dynamically driven apsidal motion fairly...
CCD photometry is presented of the type Ia SN 2001V occurred in edge-on spiral galaxy NGC 3987. The observations made through Johnson-Cousins BVRI filters were collected from Feb. 24 ( days, with respect to B-maximum), up May 5 days). light curves are analyzed revised Multi-Colour Light Curve Shape (MLCS) method ([CITE]) by fitting template vectors observed simultaneously. reddening estimated be mag, while galactic component mag (Schlegel et al. [CITE]), suggesting that part may due ISM host...
CHEOPS is a space telescope specifically designed to monitor transiting exoplanets orbiting bright stars. In September 2023, completed its nominal mission and remains in excellent operational conditions. The has been extended until the end of 2026. Scientific instrumental data have collected throughout in-orbit commissioning operations, enabling comprehensive analysis mission's performance. this article, we present results with twofold goal. First, aim inform scientific community about...
We present a comparative study of absolute distances to sample very nearby, bright Type Ia supernovae (SNe) derived from high cadence, signal-to-noise, multi-band photometric data. Our consists four SNe: 2012cg, 2012ht, 2013dy and 2014J. new homogeneous, high-cadence data in Johnson–Cousins BVRI Sloan g'r'i'z' bands taken two sites (Piszkesteto Baja, Hungary), the light curves are analyzed with publicly available curve fitters (MLCS2k2, SNooPy2 SALT2.4). When comparing best-fit parameters...