Transit timing analysis of CoRoT-1b (2009)
Csizmadia, Sz., Renner, S., Barge, P., Agol, E., Aigrain, S., Alonso, R., ...
CoRoT, the pioneer space-based transit search, steadily provides thousands of high-precision light curves with continuous time sampling over periods of up to 5 months. The transits of a planet...
Pre-discovery observations of CoRoT-1b and CoRoT-2b with the BEST survey (2009)
Rauer, H., Erikson, A., Kabath, P., Hedelt, P., Boer, M., Carone, L., ...
The BEST wide-angle telescope installed at the Observatoire de Haute-Provence and operated in remote control from Berlin by the Institut fuer Planetenforschung, DLR, has observed the CoRoT target...
Periodic variable stars in CoRoT field LRa02 observed with BEST II (2009)
Kabath, P., Erikson, A., Rauer, H., Pasternacki, T., Csizmadia, Sz., Chini, R., ...
The Berlin Exoplanet Search Telescope II (BEST II) is a small wide field-of-view photometric survey telescope system located at the Observatorio Cerro Armazones, Chile. The high duty cycle combined...
Interferometric Observations of Algol (2009)
Borkovits, T., Csizmadia, Sz., Paragi, Zs., Sturmann, L., Sturmann, J., Farrington, C., ...
We determined the spatial orientation of the Algol AB close pair orbital plane using optical interferometry with the CHARA Array, and radio interferometry with the European VLBI Network (EVN). We...
Interferometric Observations of the Hierarchical Triple System Algol (2009)
Csizmadia, Sz., Borkovits, T., Paragi, Zs., Abraham, P., Szabados, L., Mosoni, L., ...
Algol is a triple stellar system consisting of a close semidetached binary orbited by a third object. Due to the disputed spatial orientation of the close pair, the third body perturbation of this...
Rauer, H., Queloz, D., Csizmadia, Sz., Deleuil, M., Alonso, R., Aigrain, S., ...
Aims. The CoRoT space mission continues to photometrically monitor about 12 000 stars in its field-of-view for a series of target fields to search for transiting extrasolar planets ever since 2007....
Leger, A., Rouan, D., Schneider, J., Barge, P., Fridlund, M., Samuel, B., ...
We report the discovery of very shallow (DF/F = 3.4 10-4), periodic dips in the light curve of an active V = 11.7 G9V star observed by the CoRoT satellite, which we interpret as due to the presence...
Leger, A, Rouan, D, Schneider, J, Barge, P, Fridlund, M, Samuel, B, ...
We report the discovery of very shallow (DF/F = 3.4 10-4), periodic dips in the light curve of an active V = 11.7 G9V star observed by the CoRoT satellite, which we interpret as due to the presence...
On the apsidal motion of BP Vulpeculae (2008)
Csizmadia, Sz., Illes-Almar, E., Borkovits, T.
BP Vulpeculae is a bright eclipsing binary system showing apsidal motion. It was found in an earlier study that it shows retrograde apsidal motion which contradicts theory. In this paper we present...
The Young, Massive, Star Cluster Sandage-96 After the Explosion of SN 2004dj in NGC 2403 (2008)
Vinko, J., Sarneczky, K., Balog, Z., Immler, S., Sugerman, B. E. K., Brown, P. J., ...
The bright Type II-plateau supernova (SN) 2004dj occurred within the young, massive stellar cluster Sandage-96 in a spiral arm of NGC 2403. New multi-wavelength observations obtained with several...
Deleuil, M, Deeg, H J, Alonso, R, Bouchy, F, Rouan, D, Auvergne, M, ...
Context: The CoRoT space mission routinely provides high-precision photometric measurements of thousands of stars that have been continuously observed for months. Aims: The discovery and...
EM Cygni: a study of its eclipse timings (2007)
Csizmadia, Sz., Nagy, Zs., Borkovits, T., Hegedus, T., Biro, I. B., Kiss, Z. T.
EM Cygni is a Z Cam-subtype eclipsing dwarf nova. Its orbital period variations were reported in the past but the results were in conflict to each other while other studies allowed the possibility of...
Physical parameters and multiplicity of five southern close eclipsing binaries (2007)
Szalai, T., Kiss, L. L., Meszaros, Sz., Vinko, J., Csizmadia, Sz.
Aims: Detect tertiary components of close binaries from spectroscopy and light curve modelling; investigate light-travel time effect and the possibility of magnetic activity cycles; measure...
Balazs, L. G., Hetesi, Zs., Regaly, Zs., Csizmadia, Sz., Bagoly, Zs., Horvath, I., ...
We studied the statistical properties of the luminosity distance and internal extinction data of type Ia supernovae in the lists published by Tonry et al. (2003) and Barris et al. (2004). After...
The first year of SN 2004dj in NGC 2403 (2006)
Vinko, J., Takats, K., Sarneczky, K., Szabo, Gy. M., Meszaros, Sz., Csorvasi, R., ...
New BVRI photometry and optical spectroscopy of the Type IIp supernova 2004dj in NGC 2403, obtained during the first year since discovery, are presented. The progenitor cluster, Sandage 96, is also...
The rapid fading of V1647 Orionis: the sudden end of a FUor-type eruption? (2005)
Kospal, A., Abraham, P., Acosta-Pulido, J., Csizmadia, Sz., Eredics, M., Kun, M., ...
V1647 Ori is a young eruptive star, which went into outburst at the end of 2003. Since then, the object is gradually fading. In October 2005, however, V1647 Ori started a very rapid fading,...
Indirect evidence for short period magnetic cycles in W UMa stars (2005)
Borkovits, T., Elkhateeb, M. M., Csizmadia, Sz., Nuspl, J., Biro, I. B., Hegedus, T., ...
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 were found. Four of the...
Distance of the Hypernova SN 2002ap via the Expanding Photosphere Method (2004)
Vinko, J., Blake, R. M., Sarneczky, K., Csak, B., Furesz, G., Csizmadia, Sz., ...
New optical photometric and spectroscopic data of the bright hypernova SN 2002ap are presented. The obtained BVRI light curves as well as the optical spectra agree well with other published data...
The 2004--2006 outburst and environment of V1647 Ori (2004)
Acosta-Pulido, J. A., Kun, M., Abraham, P., Kospal, A., Csizmadia, Sz., Kiss, L. L., ...
(Abridged) We studied the brightness and spectral evolution of the young eruptive star V1647 Ori during its recent outburst in the period 2004 February - 2006 Sep. We performed a photometric...
Long-term evolution of FU Orionis objects at infrared wavelengths (2004)
Ábrahám, P., Kóspál, Á., Csizmadia, Sz., Kun, M., Moór, A., Prusti, T.
We investigate the brightness evolution of 7 FU Orionis systems in the 1-100 micrometer wavelength range using data from the Infrared Space Observatory (ISO). The ISO measurements were supplemented...
On the properties of contact binary stars (2004)
A catalogue of light curve solutions of contact binary stars has been compiled. It contains the results of 159 light curve solutions. Properties of contact binary stars were studied by using the...
The infrared properties of the new outburst star IRAS 05436-0007 in quiescent phase (2004)
Ábrahám, P., Kóspál, Á., Csizmadia, Sz., Moór, A., Kun, M., Stringfellow, G.
We compiled and investigated the infrared/sub-mm/mm SED of the new outburst star IRAS 05436-0007 in quiescent phase. The star is a flat-spectrum source, with an estimated total luminosity of L_bol ~...
Long-term evolution of FU Ori-type stars at infrared wavelengths (2004)
Kóspál, A., Ábrahám, P., Csizmadia, Sz.
FU Orionis-type stars form a small class of variable Young Stellar Objects, defined by an optical outburst of 5-6 mag followed by gradual fading on a timescale of decades. Since the phenomenon is...
The Type la Supernova 2001V in NGC 3987 (2002)
Vinko, J., Biro, I. B., Csak, B., Csizmadia, Sz., Derekas, A., Furesz, G., ...
CCD photometry of the type Ia SN 2001V occured in the edge-on spiral galaxy NGC 3987 is presented. The observations made through Johnson-Cousins BVRI filters were collected from Feb. 24 (t = -8 days,...
Distance to the Active Galaxy NGC 6951 via the Type Ia Supernova 2000E (2001)
Vinko, J., Csak, B., Csizmadia, Sz., Furesz, G., Kiss, L. L., Sarneczky, K., ...
CCD-photometry and low-resolution spectroscopy of the bright supernova SN 2000E in NGC 6951 are presented. Both the light curve extending up to 150 days past maximum and the spectra obtained at 1...
J. Vinkó, B. Csák, Sz. Csizmadia, G. Fürész, L. L. Kiss, ...
Abstract. CCD-photometry and low-resolution spectroscopy of the bright supernova SN 2000E in NGC 6951 are presented. Both the light curve extending up to 150 days past maximum and the spectra...