Characterization of variable stars by robust wave variograms: an application to HIPPARCOS mission

Details Characterization of variable stars by robust wave variograms: an application to HIPPARCOS mission Characterization of variable stars by robust wave variograms: an application to HIPPARCOS mission

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26as..136..421e&link_type=abstract

Astronomy and Astrophysics Supplement, v.136, p.421-428

Astronomy and Astrophysics

Astrophysics

19

Methods: Data Analysis, Methods: Statistical, Stars: Variables: General, Techniques: Photometric

Scientific paper

Variogram analysis is applied to time series of variable stars. This method allows to characterize time-scales of varying signals. It is well suited for periodic and pseudo-periodic signals. The aspects of robustness, bin positions and bin widths for the variogram estimator are assessed, evaluated with the help of simulations and adapted to the Hipparcos photometry. For instance variogram methodology is successfully applied for the detection of spurious periods, the estimation of measurement noise and the analysis of the pseudo-period of some typical Hipparcos variable stars.

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