3 papers
astro-ph.SR2026
V405 Draconis: A Deep Contact Binary with a Tertiary Companion and a Quadruple System Candidate
Maksym Yu. Pyatnytskyy, Ivan L. Andronov
We continued our analysis of the O-C diagram of the EW-type eclipsing binary V405 Dra using recently available data. We refined the orbital parameters of the third body responsible…
astro-ph.IM2025
Multi-harmonic and special shape/pattern/template approximations of discrete signals with generally irregular arguments
Ivan L. Andronov, Hanna M. Akopian, Vitalii V. Breus +7
The invited review of own algorithms and software (MAVKA and MCV) for the data analysis of astronomical signals - irregularly spaced, multi-periodic multi-harmonic, periodogram ana…
astro-ph.SR2025
The HADS Star CSS_J102714.3+205943: a Component of a Binary System with an Elliptic Orbit?
Maksym Yu. Pyatnytskyy, Ivan L. Andronov
We analyzed period changes of the high-amplitude Delta Scuti variable star CSS_J102714.3+205943 for about 20 years, utilizing data from the automated sky surveys along with our own…