CAOSP abstracts, Volume: 29, No.: 1, year: 1999

Abstract: New UBV photometry of the symbiotic nova V1329 Cyg taken in 1988-97 is presented. Long-term postoutburst UBV photoelectric, photographic and visual observations from the AAVSO and AFOEV databases are discussed. The periodogram analysis using the trigonometric polynomial fit with a linear trend reveals the mean normal epoch of the minimum and the mean best fit period as JD 2446771 +/- 3 days and 956.5 day +/- 0.6 day, respectively. The amplitude of the brightness variations is significantly higher in the U-band (1.6 mag.) than in the B,V and pg bands (1.22 mag.). The largest slope of the mean brightness decrease is in the U-band. The characteristics of the light-curves extremes in different bands are tabulated. The phases of the U,B,V light-curves coincide within the error estimates. A secondary period of 553 days and a cycle of approx. 5300 days are suggested.

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