@Article{LopesCrosJabl:2018:SeCoPe,
author = "Lopes, Carlos Eduardo Ferreira and Cross, N. J. G. and Jablonski,
Francisco Jos{\'e}",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {University
of Edinburgh} and {Instituto Nacional de Pesquisas Espaciais
(INPE)}",
title = "New insights into time series analysis III: setting constraints on
period analysis",
journal = "Monthly Notices of the Royal Astronomical Society",
year = "2018",
volume = "481",
number = "3",
pages = "3083--3097",
month = "Dec.",
keywords = "methods: data analysis – methods: statistical – techniques:
photometric – astronomical data bases: miscellaneous – binaries:
general – stars: variables: general.",
abstract = "E-science of photometric data requires automatic procedures and a
precise recognition of periodic patterns to perform science as
well as possible on large data. Analytical equations that enable
us to set the best constraints to properly reduce processing time
and hence optimize signal searches play a crucial role in this
matter. These are increasingly important because the production of
unbiased samples from variability indices and statistical
parameters has not been achievable so far. We discuss the
constraints used in periodic signals detection methods as well as
the uncertainties in the estimation of periods and amplitudes. The
frequency resolution necessary to investigate a time series is
assessed with a new approach that estimates the necessary sampling
resolution from shifts on the phase diagrams for successive
frequency grid points. We demonstrate the underlying meaning of
the oversampling factor. We reassess the frequency resolutions
required to find the variability periods of EA stars and use the
new resolutions to analyse a small sample of EAup Catalina stars,
i.e. EA stars previously classified as having insufficient number
of observations at the eclipses. As a result, the variability
periods of four EAup stars were determined. Moreover, we have a
new approach to estimate the amplitude and period variations. From
these estimations, information about the intrinsic variations of
the sources is obtained. For a complete characterization of the
light-curve signal, the period uncertainty and period variation
must be determined. Constraints on periodic signal searches were
analysed and delimited.",
doi = "10.1093/mnras/sty2469",
url = "http://dx.doi.org/10.1093/mnras/sty2469",
issn = "0035-8711 and 1365-2966",
language = "en",
targetfile = "lopes_new.pdf",
urlaccessdate = "27 abr. 2024"
}