CCD PHOTOMETRY OF NOVA V1974 CYGNI IN 1995

Citation
A. Olech et al., CCD PHOTOMETRY OF NOVA V1974 CYGNI IN 1995, Acta Astronomica, 46(3), 1996, pp. 311-323
Citations number
15
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
00015237
Volume
46
Issue
3
Year of publication
1996
Pages
311 - 323
Database
ISI
SICI code
0001-5237(1996)46:3<311:CPONVC>2.0.ZU;2-W
Abstract
We report on analysis of I CCD photometry of Nova V1974 Cygni from the observational season 1995. The analysis shows that both short-term mo dulations with periods 0.0813 and 0.085 days (whose values are close t o 2-day aliases of one another) are still present in the light curve o f Nova V1974 Cygni. Contrary to the 1994 situation the amplitude of th e 0.085-day modulation in 1995, was, on the average, smaller than the amplitude of the 0.0813-day modulation. The observations give evidence that the 0.0813-day period, interpreted as the orbital period of the system, decreased during the time interval 1993-1995. The 0.085-day pe riod, observed as decreasing in 1994, stopped decreasing and seems to increase since the middle of 1995. The light curve of V1974 Cygni obse rved during some nights at the end of the 1995 season resembles the li ght curve of a polar with two sets of minima.