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authFullName_s : G. Kostandyan

M dwarfs found in the first Byurakan spectral sky survey database. Gaia EDR3 and TESS data. Some preliminary results

K. S. Gigoyan , Alain Sarkissian , G. Kostandyan , K. Gigoyan , Mustapha Meftah , et al.
Publications of the Astronomical Society of Australia, 2023, 40, pp.e023. ⟨10.1017/pasa.2023.20⟩
Journal articles insu-04083048v1

New Carbon Stars Confirmed in the Digitized First Byurakan Survey Database

Kamo S. Gigoyan , G. Kostandyan , Karen K. Gigoyan , F. Zamkotsian , Alain Sarkissian
Astrophysics, 2019, 62 (4), pp.573-577. ⟨10.1007/s10511-019-09605-3⟩
Journal articles insu-02385698v1
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Investigation of Faint Galactic Carbon Stars from the First Byurakan Spectral Sky Survey. III. Infrared Characteristics

K. S. Gigoyan , Alain Sarkissian , C. Rossi , D. Russeil , G. Kostandyan , et al.
Astrophysics, 2017, 60 (1), pp.70-82. ⟨10.1007/s10511-017-9463-z⟩
Journal articles insu-01503247v1

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

K. K. Gigoyan , K. S. Gigoyan , Alain Sarkissian , Mustapha Meftah , G. Kostandyan , et al.
Astrophysics, 2023, 66, pp.194-204. ⟨10.1007/s10511-023-09781-3⟩
Journal articles insu-04175279v1

FBS 0137+400: an N-type semiregular variable carbon star

K. S. Gigoyan , G. Kostandyan , Alain Sarkissian , D. Russeil
Astrophysics, 2013, 56 (2), pp.267-270. ⟨10.1007/s10511-013-9285-6⟩
Journal articles istex hal-00833020v1

New CH Carbon Stars Found in the DFBS

G. Kostandyan , K. S. Gigoyan , Alain Sarkissian , Mustapha Meftah , F. Zamkotsian
Astrophysics, 2017, 60 (2), pp.300 - 303. ⟨10.1007/s10511-017-9483-8⟩
Journal articles insu-01562571v1

Investigation of Faint Galactic Carbon Stars from the First Byurakan Spectral sky Survey. Optical Variability. I. N-Type AGB Carbon Stars. K-band Absolute Magnitudes and Distances

K. S. Gigoyan , Alain Sarkissian , D. Russeil , Nicolas Mauron , G. Kostandyan , et al.
Astrophysics, 2014, 57 (4), pp.510-519. ⟨10.1007/s10511-014-9354-5⟩
Journal articles hal-01084253v1

Investigation of Faint Galactic Carbon Stars from the First Byurakan Spectral Sky Survey. II. Early-Type Carbon Stars

K. S. Gigoyan , Alain Sarkissian , D. Russeil , Nicolas Mauron , G. Kostandyan , et al.
Astrophysics, 2015, 58 (3), pp.369-379. ⟨10.1007/s10511-015-9390-9⟩
Journal articles insu-01203258v1