437 citations · 3.2k across the 94 of their papers we have counts for
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Binarity and multiperiodicity in high-amplitude delta Scuti stars
A. Derekas, L. L. Kiss, T. R. Bedding +10
We have carried out a photometric and spectroscopic survey of bright high-amplitude delta Scuti (HADS) stars. The aim was to detect binarity and multiperiodicity (or both) in order…
The University of New South Wales Extrasolar Planet Search: a catalogue of variable stars from fields observed 2004--2007
J. L. Christiansen, A. Derekas, L. L. Kiss +7
We present a new catalogue of variable stars compiled from data taken for the University of New South Wales Extrasolar Planet Search. From 2004 October to 2007 May, 25 target field…
The first high-amplitude delta Scuti star in an eclipsing binary system
J. L. Christiansen, A. Derekas, M. C. B. Ashley +4
We report the discovery of the first high-amplitude delta Scuti star in an eclipsing binary, which we have designated UNSW-V-500. The system is an Algol-type semi-detached eclipsin…
A new detached K7 dwarf eclipsing binary system
T. B. Young, M. G. Hidas, J. K. Webb +4
We present an analysis of a new, detached, double-lined eclipsing binary system with K7 Ve components, discovered as part of the University of New South Wales Extrasolar Planet Sea…
Eclipsing binaries in the MACHO database: New periods and classifications for 3031 systems in the Large Magellanic Cloud
A. Derekas, L. L. Kiss, T. R. Bedding
Eclipsing binaries offer a unique opportunity to determine fundamental physical parameters of stars using the constraints on the geometry of the systems. Here we present a reanalys…
ESC and KAIT Observations of the Transitional Type Ia SN 2004eo
A. Pastorello, P. A. Mazzali, G. Pignata +31
We present optical and infrared observations of the unusual Type Ia supernova (SN) 2004eo. The light curves and spectra closely resemble those of the prototypical SN 1992A, and the…
Defining the instability strip of pulsating post-AGB binary stars from ASAS and NSVS photometry
L. L. Kiss, A. Derekas, Gy. M. Szabo +2
We analyse public domain time-series photometric observations of 30 known and candidate binary post-AGB stars for measuring pulsation and orbital periods. We derive periodicities f…
RR Lyrae stars in the southern globular cluster NGC 362
P. Szekely, L. L. Kiss, R. Jackson +3
NGC 362 is a bright southern globular cluster for which no extensive variability survey has ever been done. Time-series CCD photometric observations have been obtained. Light curve…
Eclipsing binaries in the LMC: a wealth of data for astrophysical tests
A. Derekas, L. L. Kiss, T. R. Bedding
We have analysed publicly available MACHO observations of 6833 variable stars in the Large Magellanic Cloud, classified as eclipsing binaries. After finding that a significant frac…
The anomalous Cepheid XZ Ceti
Laszlo Szabados, Laszlo L. Kiss, Aliz Derekas
XZ Ceti is the only known anomalous Cepheid in the Galactic field. Being the nearest and brightest such variable star, a detailed study of XZ Ceti may shed light on the behaviour o…
Ellipsoidal Variability and Long Secondary Periods in MACHO Red Giant Stars
A. Derekas, L. L. Kiss, T. R. Bedding +3
We present a period-luminosity-amplitude analysis of 5899 red giant and binary stars in the Large Magellanic Cloud, using publicly available observations of the MACHO project. For…
Nearby debris disk systems with high fractional luminosity reconsidered
A. Moor, P. Abraham, A. Derekas +5
By searching the IRAS and ISO databases we compiled a list of 60 debris disks which exhibit the highest fractional luminosity values (fd>10^-4) in the vicinity of the Sun (d<120pc)…
Binarity and multiperiodicity in high-amplitude delta Scuti stars
A. Derekas, L. L. Kiss, B. Csak +6
We present our first results for a sample of southern high-amplitude delta Scuti stars (HADS), based on a spectrophotometric survey started in 2003. For CY Aqr and AD CMi, we found…
New clues on outburst mechanisms and improved spectroscopic elements of the black-hole binary V4641 Sagittarii
C. Lindstrom, J. Griffin, L. L. Kiss +4
We present spectroscopic observations of the black-hole binary V4641 Sagittarii, obtained between 4th July 2004 and 28th March 2005, which cover the minor outburst of the star in e…
The UNSW Extrasolar Planet Search: Methods and First Results from a Field Centred on NGC 6633
M. G. Hidas, M. C. B. Ashley, J. K. Webb +7
We report on the current status of the University of New South Wales Extrasolar Planet Search project, giving details of the methods we use to obtain millimagnitude precision photo…
A first-overtone RR Lyrae star with cyclic period changes
A. Derekas, L. L. Kiss, A. Udalski +2
A detailed light curve analysis is presented for a first-overtone RR Lyrae star, MACHO* J050918.712-695015.31, based on MACHO and OGLE-III observations. As a foreground object of t…
On the close optical companion of V1494 Aql: problems with light curve modelling
L. L. Kiss, B. Csak, A. Derekas
New observations of the eclipsing nova V1494 Aql were analysed in order to estimate the effect of the optical companion located 1.4 arcsec southwest. R and I-band images (stellar F…
The first CCD photometric study of the open cluster NGC 2126
A. Gaspar, L. L. Kiss, T. R. Bedding +6
We present the first CCD photometric observations of the northern open cluster NGC 2126. Data were taken on eight nights in February and December 2002 with a total time span of ~57…
A photometric monitoring of bright high-amplitude delta Scuti stars. II. Period updates for seven stars
A. Derekas, L. L. Kiss, P. Szekely +10
We present new photometric data for seven high-amplitude delta Scuti stars. The observations were acquired between 1996 and 2002, mostly in the Johnson photometric system. For one…
A photometric monitoring of bright high-amplitude delta Scuti stars. I. The double-mode pulsation of V567 Ophiuchi
L. L. Kiss, A. Derekas, Sz. Meszaros +1
We present the first results of an observational project, which addresses the period changing behaviour of a sample of high-amplitude delta Scuti stars. In this paper we discuss th…
The multimode pulsation of the delta Scuti star V784 Cassiopeae
L. L. Kiss, A. Derekas, E. J. Alfaro +5
We present an analysis of new Johnson and Stromgren photometric and medium-resolution spectroscopic observations of the delta Scuti type variable star V784 Cassiopeae. The data wer…
Nova Cygni 2001/2 = V2275 Cyg
L. L. Kiss, N. Gogh, J. Vinko +5
We present an analysis of low- and medium resolution spectra of the very fast nova, Nova Cygni 2001/2 (V2275 Cyg) obtained at nine epochs in August, September and October, 2001. Th…