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astro-ph.IM2026★ 5 cited
Robust 1-norm periodograms for analysis of noisy non-Gaussian time series with irregular cadences: Application to VLBI astrometry of quasars
Valeri V. Makarov, Sébastien Lambert, Phil Cigan +2
Astronomical time series often have non-uniform sampling in time, or irregular cadences, with long gaps separating clusters of observations. Some of these data sets are also explic…
astro-ph.IM2024
Metrics of Astrometric Variability in the International Celestial Reference Frame: I. Statistical analysis and selection of the most variable sources
Phil Cigan, Valeri Makarov, Nathan Secrest +3
Using very long baseline interferometry data for the sources that comprise the third International Celestial Reference Frame (ICRF3), we examine the quality of the formal source po…