Using the methods of wavelet analysis and singular spectrum analysis in the study of radio source BL Lac

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dc.contributor.authorDonskykh, G. I.
dc.contributor.authorRyabov, Myhaylo I.
dc.contributor.authorSukharev, A. L.
dc.contributor.authorAller, M. F.
dc.contributor.authorРябов, Михайло Іванович
dc.date.accessioned2015-02-24T09:18:27Z
dc.date.available2015-02-24T09:18:27Z
dc.date.issued2014
dc.descriptionOdessa Astronomical publications / Одесская астроном. обсерватория . – Одесса : Астропринт, 2014 . – Vol.27, I. 1.uk
dc.description.abstractWe investigated the monitoring data of extragalactic source BL Lac. This monitoring was held with University of Michigan 26-meter radio telescope. To study flux density of extragalactic source BL Lac at frequencies of 14.5, 8 and 4.8 GHz, the wavelet analysis and singular spectrum analysis were used. Calculating the integral wavelet spectra allowed revealing long-term components (~7-8 years) and short-term components (~ 1-4 years) in BL Lac. Studying of VLBI radio maps (by the program Mojave) allowed investigating features of components movement relatively to the VLBI core. The data of radio astronomy observations were also investigated using singular spectrum analysis. This method can solve the task of allocating trend, detection of periodic components and band-pass filtering (reconstruction of time series from quantity of main components, the last corresponds to individual bands of periods on time-frequency spectra or Fourier spectra). Singular spectrum analysis does not use the analyzing function, so its calculations allow to distinguish various components of investigated series with a high accuracy. To get spectral power distribution depending on time in the studied narrowband components obtained by singular spectrum analysis, short-term Fourier transformation was useduk
dc.identifier.citationOdessa Astronomical Publicationsuk
dc.identifier.urihttps://dspace.onu.edu.ua/handle/123456789/5909
dc.language.isoenuk
dc.publisherAstroprintuk
dc.relation.ispartofseries;V. 27, I. 1, P. 69-70.
dc.subjectBL Lacuk
dc.subjectjetuk
dc.titleUsing the methods of wavelet analysis and singular spectrum analysis in the study of radio source BL Lacuk
dc.typeArticleuk
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Odesa Astronomical Publications