SIMBAD references

2000IBVS.4950....1K - IAU Inform. Bull. Var. Stars, 4950, 1 (2000/September-0)

Period variation of XX Cygni revisited.

KISS L.L. and DEREKAS A.

Abstract (from CDS):

New CCD observations are presented and the period variation of XX Cygni is discussed. Five new times of maxima were determined and the most recent O-C diagram was created by collecting all available epochs of maximum. We did not find evidence of possible period change since that jump in 1942 described in details by Szeidl & Mahdy (1981). A new accurate ephemeris is given.

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Simbad objects: 3

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