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  1. No Access

    Article

    The Digitized First Byurakan Survey Database Late-Type Stars Candidates. New Confirmations. II

    Three new carbon C stars was confirmed among the sample of the Late-Type Stars candidates, selected on the Digitized First Byurakan Survey (DFBS) spectral plates. The DFBS is the digitized version of the First...

    K. K. Gigoyan, K. S. Gigoyan, A. Sarkissian, M. Meftah, S. Bekki… in Astrophysics (2024)

  2. No Access

    Article

    The Digitized First Byurakan Survey Data Base. Late-Type Stars Candidates. New Confirmations. I

    The Digitized First Byurakan Survey (DFBS) is the digitized version of the First Byurakan Survey (FBS, or Markarian survey). The FBS was the first systematic survey of the extragalactic sky. This objective-pri...

    K. S. Gigoyan, K. K. Gigoyan, A. Sarkissian, G. R. Kostandyan, M. Meftah… in Astrophysics (2023)

  3. No Access

    Article

    TYC 1417-891-1 and TYC 1478-742-1: Eclipsing Variable Stars. The Gaia EDR3 and TESS Photometric Data

    Based on the TESS (Transiting Exoplanet Survey Satellite) phase dependent light curves, we confirm the eclipsing type variability nature for two G-type dwarfs: TYC 1417-891-1 and TYC 1478-742-1. Both objects s...

    K. K. Gigoyan, K. S. Gigoyan, A. Sarkissian, M. Meftah, G. R. Kostandyan… in Astrophysics (2023)

  4. Article

    Open Access

    HiRISE - High-Resolution Imaging and Spectroscopy Explorer - Ultrahigh resolution, interferometric and external occulting coronagraphic science

    Recent solar physics missions have shown the definite role of waves and magnetic fields deep in the inner corona, at the chromosphere-corona interface, where dramatic and physically dominant changes occur. HiR...

    Robertus Erdélyi, Luc Damé, Andrzej Fludra, Mihalis Mathioudakis… in Experimental Astronomy (2022)

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  5. No Access

    Article

    Investigations of the Periodic Variables in the Catalina and Linear Databases

    In this study we continue spectral class determinations for large numbers of optically faint periodic variables taken from the Catalina Surveys Data Release 1 (CSDR1) and LINEAR data sets. Spectral classes and...

    K. S. Gigoyan, G. R. Kostandyan, K. K. Gigoyan, A. Sarkissian, M. Meftah… in Astrophysics (2021)

  6. No Access

    Article

    New Carbon Stars in the Catalina Catalog of Periodic Variables

    This study is about carbon stars detected in a program of spectral type determinations for a large amount of optically faint periodic variables. These variables are taken from the Catalina Survey Data Release-...

    K. S. Gigoyan, N. Mauron, A. Sarkissian, F. Zamkotsian, G. R. Kostandyan… in Astrophysics (2018)

  7. No Access

    Article

    New CH Carbon Stars Found in the DFBS

    G. Kostandyan, K. S. Gigoyan, A. Sarkissian, M. Meftah, F. Zamkotsian in Astrophysics (2017)

  8. No Access

    Article

    Investigation of Faint Galactic Carbon Stars from the First Byurakan Spectral Sky Survey. III. Infrared Characteristics

    InfraRed (IR) astronomical databases, namely, IRAS, 2MASS, WISE, and Spitzer, are used to analyze photometric data of 126 carbon (C) stars whose spectra are visible in the First Byurakan Survey (FBS) low-resol...

    K. S. Gigoyan, A. Sarkissian, C. Rossi, D. Russeil, G. Kostandyan… in Astrophysics (2017)