Journal of Astronomy and Space Sciences
- Volume 11 Issue 1
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- Pages.21-30
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- 1994
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- 2093-5587(pISSN)
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- 2093-1409(eISSN)
UBV PHOTOMETRY AT THE OUTSIDE ECLIPSE PHASE OF AZ CASSIOPEIAE
Abstract
VV Cep-type long period spectroscopic-eclipsing binary AZ Cas has been observed for five years, 1985 Oct~1990 Feb, UBV at the Ilsan Station of Yonsei University Observatory. A total of 431 observations (U=129, B=142 and V=160) are made for 86 nights. Instrumental differential UBV and B-V light curves made with these observations cover phases nearly a half of one period. There is no appreciable light variation in V but in other two passbands a gradual decrease of the brightness is clearly noticed. The loss of light in B resulted in a reddening in
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