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Optical Short-Time Variations in GK Persei during the 1983 Outburst

Published online by Cambridge University Press:  12 April 2016

H. Steinle  and
W. Pietsck
H. Steinle
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik, Garching, F.R.G.
W. Pietsck
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik, Garching, F.R.G.

Abstract

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During the August 1983 outburst of the old nova GK Persei observations with EXOSAT showed for the first time a 351 second periodicity in X-rays.

Our fast photometry (U(B)V with 25 sec time resolution) was made at the end of the outburst in the nights of September 29 , and October 1–3 , using the 2.2 meter telescope at Calar Alto (Spain).

Optical variations up to 10% in U and 4% in V with periodicities in the range 350 to 360 seconds were found, lasting only for few cycles.

A comparison with the extrapolated prediction of the X-ray maxima did not show a coincidence, but rather an anticoincidence in several cases. This supports a model of reprocessed X-rays at the inner edge of an accretion disk.

Type
V. Nova and Dwarf Nova Outbursts
Information
International Astronomical Union Colloquium , Volume 93: Cataclysmic Variables: Recent Multi-Frequency Observations and Theoretical Developments , 1987 , pp. 485
Copyright
Copyright © Reidel 1987