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XZ Cygni: Recent Period Study, Again

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Maryjane Taylor

71 N. E. 28th Court, Boynton Beach, FL 33435




This paper analyzes the behavior of the RR Lyrae type variable star XZ Cygni over the past nine years. One hundred visual light curves were analyzed, and forty selected, from wich primary and secondary (Blazhko) periods were computed. Findings indicate that the primary period of XZ Cygni has remained almost equal to that derived by Baldwin (1973), or 0?466474, at least through 1974. The secondary period was calculated to be 58?318, through 1973. This result, although considered only an average, also approximates Baldwin's determination. In addition, times of maxima reveal a relationship of O-C residuals and maximum magnitude with secondary phase position.


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