High speed photometry of GK Persei during the 1983 outburst

Details High speed photometry of GK Persei during the 1983 outburst High speed photometry of GK Persei during the 1983 outburst

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...149..470m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 149, no. 2, Aug. 1985, p. 470-474.

Astronomy and Astrophysics

Astrophysics

15

Dwarf Novae, Light Curve, Stellar Mass Accretion, Stellar Spectrophotometry, X Ray Binaries, Bursts, Power Spectra

Scientific paper

High speed photometry of GK Persei during the last 1983 outburst is presented and discussed. On September 12 a 360 + or - 7 s periodic modulation with an amplitude of approximately 4 percent was detected. This is the optical counterpart of the 531 s periodicity detected by Exosat during the eruption. The August observations show an approximately 400 s periodic modulation and a long term approximately 0.8 h variation. A long term modulation of similar time scale was also present in the X-ray data. Although the nature of this long term variation is not yet clear, the possibility is discussed that it gave rise to the 400 s modulation by some beat phenomenon with the 351 s periodicity.

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