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RT Vir - A Semiregular Star With Maser Emission: Mathematical Modelling of Optical Variability
Andronov, I. L.; Kudashkina, L. S.
The historical light curve of the semiregular pulsating star RT Vir (SRb, Sp M8III) with a maser emission is analyzed based on the AAVSO database. The star is extensively studied in the IR, radio and the optical ranges. The value of the period from the CCVS (155d) conflicts with some observational data. Signs of a systematic variability were also …
Fon Dushanbe Catalogue. Results of Processing in the Tycho-2 System
Andruk, V. M.; Protsyuk, Yu. I.; Yuldoshev, Q. +2 more
In the Tycho-2 catalogue system the processing of 1529 photographic plates of the FON Dushanbe project from the collection of the Institute of Astrophysics of the National Academy of Sciences of Tajikistan was completed. The photographic plates with the size of 8°×8° (30x30 cm) were exposed in the zones from -8° to + 84° in the period of 1985-1992…
Early Kyiv Observations of Asteroids: Analysis and New Reduction with Tycho-2 and Gaia Catalogs
Shatokhina, S. V.; Kazantseva, L. V.
For more than 50 years, the continuous photographic observations of asteroids have been carried outwith telescopes of the Astronomical Observatory of the Taras Shevchenko National University of Kyiv and the Main Astronomical Observatory of the National Academy of Sciences of Ukraine. About 3,000 photographic plates were obtained, some of which wer…
Asteroid Positions Based on the Dushanbe Part of the FON Project Observations
Andruk, V. M.; Shatokhina, S. V.; Yizhakevych, O. M. +4 more
Asteroid images identification and creation the positional catalogs based on digitized photographic observations of previous years were continued. Namely, the cooperation between Ukrainian Virtual Observatory (UkrVO) and the Institute of Astrophysics of the Academy of Sciences of Tajikistan make it possible to expand this work by involving numerou…
Probabilities of Physical Link Between the Components of the Selected Multiple Systems from WDS Catalog
Protsyuk, Yu. I.; Maigurova, N. V.
Astrometric CCD observations of visual components of double and multiple stars were performed using the RI MAO Axial Meridian Circle (AMC) with new Apogee Alta AI-F8300 CCD camera mounted at the telescope in 2018. Observations were carried out automatically in driftscan mode using a standard R filter. Objects for observational program were selecte…
On the Fon Astroplate Project Accomplishment
Ehgamberdiev, Sh. A.; Andruk, V. M.; Pakuliak, L. K. +10 more
The plan of the photographic survey of the northern sky (FON) was proposed in 1976 in Golosiiv observatory (now MAO NAS of Ukraine) by I. Kolchinsky and A. Onegina. The final project of the Compiled FONAC catalog (FON Astrographic Catalog) is based on the digital data of photographic plates exposed at four observatories. They are MAO NAS of Ukrain…
The Catalogues Analysis of Stars Equatorial Coordinates and B-Magnitude of the FON Project
Andruk, V. M.; Akhmetov, V. S.; Protsyuk, Yu. I. +1 more
FON project was expected a catalogue of stellar positions and B magnitude of Northern sky from combination six astronomical observatories of the former USSR were equipped with the same wide-angle astrographs: Goloseevo (Ukraine), Zvenigorod, Zelenchuk (Russia), Abastumani (Georgia), Kitab (Uzbekistan) and HisorAO (Tajikistan). This paper has been …
Baldone 1.2m Telescope Plate Archive - Hidden Reserves of the FON Project
Andruk, V.; Eglitis, I.; Protsyuk, Yu. +3 more
The plate archive of the 1.2 m Baldone telescope (Latvia) has approximately 780 and 4660 astronegatives exposed in 1967-1993 in the U (ZU21 + UG1 filter plates) and V (A600N + ZS17 filter films) closed to Johnson system U and V passbands. Digitization of astronegatives is carried out using the Epson Expression 10000XL scanner, the scanning mode is…
The First Results of Processing Observations of SS Bodies from UBAI Photographic Plate Collection Using the New Technique
Andruk, V. M.; Pakuliak, L. K.; Yizhakevych, O. M. +2 more
The paper presents the first results of processing of photographic observations of SS bodies based on materials from the collection of plates of the Ulugh Beg Astronomical Institute of the Academy of Sciences of the Republic of Uzbekistan (UBAI). The glass archive of the UBAI has about 15 thousand photographic plates with images of various space o…
Investigation of the Microtek Scanmaker 1000XL Plus Scanner of the Institute of Astrophysics of the Academy of Sciences of the Republic of Tajikistan
Andruk, V.; Yuldoshev, Q.; Mullo-Abdolov, A. +3 more
This work was done to estimate the accuracy of the processing method of photographic plates and the detailed study of the Microtek ScanMaker 1000XL Plus scanner, which plans to be used for the digitizing of about 1600 photographic plates of the Astrophysics Institute of the Academy of Sciences of the Republic of Tajikistan (Dushanbe) recorded for …