The optical observations of the X-ray Nova in Vulpecula (ASM 2000 + 25) during July-November 1988

Details The optical observations of the X-ray Nova in Vulpecula (ASM 2000 + 25) during July-November 1988 The optical observations of the X-ray Nova in Vulpecula (ASM 2000 + 25) during July-November 1988

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989pazh...15..611p&link_type=abstract

Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 15, July 1989, p. 611-616. In Russian. In Russian. In Russian.

Astronomy and Astrophysics

Astronomy

3

Novae, Stellar Spectra, Visible Spectrum, X Ray Stars, Black Holes (Astronomy), Brightness Distribution, Light Curve, Power Spectra

Scientific paper

Observations of the X-ray Nova in Vulpecula from July through November were carried out at the Crimean Astrophysical Observatory during a decrease in its brightness with a mean velocity of 0.013 per day in the visible range of the spectrum. Rapid variations with a period of 0.348 d and slow ones with a characteristic time of 8.3 d and an amplitude near 0.1 m are found. The color index of the Nova according to the data obtained on August 4-8 is B-V = 1.2 m.

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