Search Results - "Kostandyan, G R"

Investigations of the Periodic Variables in the Catalina and Linear Databases by Gigoyan, K. S., Kostandyan, G. R., Gigoyan, K. K., Sarkissian, A., Meftah, M., Russeil, D., Zamkotsian, F., Rahmatullaeva, F. D., Paronyan, G.

“…In this study we continue spectral class determinations for large numbers of optically faint periodic variables taken from the Catalina Surveys Data Release 1…”
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Revised and updated catalogue of the First Byurakan Survey of Late-Type Stars: second edition by Gigoyan, K S, Mickaelian, A M, Kostandyan, G R

“…ABSTRACT A total of 18 lists of the First Byurakan Survey of Late-Type Stars (FBS LTS) were published between 1990 and 2016. The stars were found on FBS…”
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Study of Faint Galactic Carbon Stars from the First Byurakan Spectral Sky Survey. IV. GAIA DR2 Data by Kostandyan, G. R.

“…Data from the second Gaia release (Gaia DR2) are used to analyze and evaluate several important parameters for 127 carbon (C) stars of which 56 are AGB stars…”
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The Digitized First Byurakan Survey Data Base. Late-Type Stars Candidates. New Confirmations. I by Gigoyan, K. S., Gigoyan, K. K., Sarkissian, A., Kostandyan, G. R., Meftah, M., Bekki, S.

“…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…”
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The Digitized First Byurakan Survey Database Late-Type Stars Candidates. New Confirmations. II by Gigoyan, K. K., Gigoyan, K. S., Sarkissian, A., Meftah, M., Bekki, S., Karapetyan, E., Rahmatullaeva, F., Kostandyan, G. R.

“…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…”
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TYC 1417-891-1 and TYC 1478-742-1: Eclipsing Variable Stars. The Gaia EDR3 and TESS Photometric Data by Gigoyan, K. K., Gigoyan, K. S., Sarkissian, A., Meftah, M., Kostandyan, G. R., Rahmatullaeva, F.

“…Based on the TESS (Transiting Exoplanet Survey Satellite) phase dependent light curves, we confirm the eclipsing type variability nature for two G-type dwarfs:…”
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Oxygen-Rich Cool Stars in the Cepheus Region. New Spectroscopic Observations of Selected Objects from the KP2001 Catalog by Petrosyan, G. V., Gigoyan, K. S., Karapetyan, E., Kostandyan, G. R.

“…Spectra taken with the 2.6-m telescope at the Byurakan Astrophysical Observatory (BAO) in the λλ4000-7250Å range for eight M giants from the KP2001 catalog…”
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New Asymptotic Giant Branch Carbon Stars in the Galactic Halo by Mauron, N., Gigoyan, K. S., Kostandyan, G. R.

“…For the first time the data on the eight confirmed or candidate carbon (C) stars found mainly from objective-prism plates are presented. By using the Catalina…”
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New Carbon Stars in the Catalina Catalog of Periodic Variables by Gigoyan, K. S., Mauron, N., Sarkissian, A., Zamkotsian, F., Kostandyan, G. R., Meftah, M., Gigoyan, K. K., Vartanian, R.

“…This study is about carbon stars detected in a program of spectral type determinations for a large amount of optically faint periodic variables. These…”
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New Carbon Stars Confirmed in the Digitized First Byurakan Survey Database by Gigoyan, K. S., Kostandyan, G. R., Gigoyan, K. K., Zamkotsian, F., Sarkissian, A.

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