Volume 425 -
The Multifaceted Universe: Theory and Observations - 2022 (MUTO2022) -
Astronomical instruments and methods
A method for Identifying the Effects of Nonstationarity in the Radio Emission from Nearby Stellar Systems in Spaced Observations
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Pre-published on:
September 24, 2022
Published on:
December 14, 2022
Abstract
We describe a method for processing the records produced on two (as well as a larger number)
RT32 radio telescopes at the Badary and Zelenchukskaya observatories of the Institute of Applied
Astronomy of RAS (IAA RAS) with broadband continuous spectrum receivers at wavelengths
of 6.2 and 3.5 cm in the circular polarization receiving mode. The method is based on the
calculation of the cross-correlation matrix for the Pearson correlation coefficients, where the
horizontal elements are the coefficients of the simultaneous groups of samples in a sliding time
window, and the vertical variable is its width. Our software implementation of the method in
Python, PICASO (Pearson Image Correlation Array Stars Observing), allows the result of the
calculations to be displayed in the form of a triangular image of correlation levels in grayscale or
in pseudocolor. The examples of processed observations for the star TRAPPIST-1 with a planetary
system and the quasar 3C147 are presented.
RT32 radio telescopes at the Badary and Zelenchukskaya observatories of the Institute of Applied
Astronomy of RAS (IAA RAS) with broadband continuous spectrum receivers at wavelengths
of 6.2 and 3.5 cm in the circular polarization receiving mode. The method is based on the
calculation of the cross-correlation matrix for the Pearson correlation coefficients, where the
horizontal elements are the coefficients of the simultaneous groups of samples in a sliding time
window, and the vertical variable is its width. Our software implementation of the method in
Python, PICASO (Pearson Image Correlation Array Stars Observing), allows the result of the
calculations to be displayed in the form of a triangular image of correlation levels in grayscale or
in pseudocolor. The examples of processed observations for the star TRAPPIST-1 with a planetary
system and the quasar 3C147 are presented.
DOI: https://doi.org/10.22323/1.425.0009
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Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.