UBVRI photometry of the eclipsing symbiotic star CI Cyg during 1991 1996

Details UBVRI photometry of the eclipsing symbiotic star CI Cyg during 1991 1996 UBVRI photometry of the eclipsing symbiotic star CI Cyg during 1991 1996

Apr 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ap.....39..112d&link_type=abstract

Astrophysics, Volume 39, Issue 2, pp.112-114

Astronomy and Astrophysics

Astrophysics

Scientific paper

UBVRI observations of the eclipsing symbiotic star CI Cyg made during 1991 1995 are analyzed, the results of which indicate that the system is in the same quiescent state as during 1985 1990. Variations in the "extra-eclipse" color index U-B with an amplitude of about 0m.3 0m.4 and a characteristic time of about 9 10 yr have been detected for the first time. A more thorough analysis of all available data in the UBVRI bands of the spectrum will be required to investigate the existence of possible long-period variations in the other color indices and brightness of the system.

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