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Modelling the rotation period distribution of M dwarfs in the Kepler field
(Springer Verlag, 2018)
McQuillan et al. (Mon. Not. R. Astron. Soc.432:1203, 2013) presented 1570 periods P of M dwarf stars in the field of view of the Kepler telescope. It is expected that most of these reflect rotation periods, due to starspots. ...
A detection threshold in the amplitude spectra calculated from Kepler data obtained during K2 mission.
(Oxford University Press, 2015)
We present our analysis of simulated data in order to derive a detection threshold which can
be used in the pre-whitening process of amplitude spectra. In case of ground-based data of
pulsating stars, this threshold is ...
On the nature of the variable star UNSW-V-760
(Oxford University Press, 2011)
The results of multicolour photometric monitoring over several nights of the probable X-ray
source UNSW-V-760 are presented. Drawing on both present and past observations, it is
shown that the star is multiperiodic and ...
The analysis of indexed astronomical time series – XI. The statistics of oversampled white noise periodograms
(Oxford University Press, 2015)
The distribution of the maxima of periodograms is considered in the case where the time
series is made up of regularly sampled, uncorrelated Gaussians. It is pointed out that if there
is no oversampling, then for large ...
An extensive search for rapid optical variability in ultracool dwarfs
(Oxford University Press, 2013)
In this paper, a summary of optical time-series photometry of 125 ultracool dwarfs is given.
The observing strategy was to monitor each object continuously for 2–3 h in order to ascertain
whether itwas rapidly variable. ...
An O−C (and light travel time) method suitable for application to large photometric databases
(Oxford University Press, 2014)
The standard method of studying period changes in variable stars is to study the timing
residuals or O−C values of light-curve maxima or minima. The advent of photometric surveys
for variability, covering large parts of ...
Multicolour time series photometry of four short-period weak-lined T Tauri stars
(Oxford University Press, 2015)
The paper describes continuous photometric monitoring of four pre-main-sequence stars,
probable members of young stellar associations. Measurements, covering at least four nights
per star, were obtained by cycling through ...
Multicolour time series photometry of the variable star 1SWASP J234401.81−212229.1
(Oxford University Press, 2014)
1SWASP J234401.81-212229.1 may be one of a handful of contact binaries comprising two
Mdwarfs. Modelling of the available observations is complicated by the fact that the radiation
of the eclipsing system is dominated ...
On multiple classes of gamma-ray bursts, as deduced from autocorrelation functions or bivariate duration/hardness ratio distributions
(Oxford University Press, 2012)
Autocorrelation functions (ACFs) of 119 gamma-ray bursts (GRBs) monitored by the Burst
Alert Telescope (BAT) on Swift are calculated. Contrasting with previous results for smaller
numbers of bursts from other missions, ...
Estimation of the coherence time of stochastic oscillations from modest samples
(Oxford University Press, 2012)
‘Quasi-periodic’ or ‘solar-like’ oscillations can be described by three parameters – a characteristic
frequency, a coherence time (or ‘quality factor’) and the variance of the random
driving process. This paper is concerned ...