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International Astronomical Union Colloquium International Astronomical Union Colloquium

Article contents

Long-Term Optical Photometry of the Dwarf Nova VW Hyi*

Published online by Cambridge University Press:  12 April 2016

S.F. Van Amerongen  and
J. Van Paradijs
S.F. Van Amerongen
Affiliation:
Astronomical Institute ‘Anton Pannekoek’, University of Amsterdam, Amsterdam, The Netherlands
J. Van Paradijs
Affiliation:
Astronomical Institute ‘Anton Pannekoek’, University of Amsterdam, Amsterdam, The Netherlands
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Abstract

Long-term five-colour photometry of the dwarf nova VW Hyi shows no evidence for a secular change of the flux during the quiescent interval between normal outbursts (3σ upper limits between 0.16 and 0.20 mag in the five passbands). However, the amplitudes in the orbital B-U and U-W colour curves change during quiescence. A delay in the progress of normal outbursts toward higher frequencies confirms the delay, seen with IUE, in the onset of a normal outburst toward higher frequencies. Just after outburst, the system is substantially bluer than later in quiescence.

Type
II. Radio, IR and Optical Observations
Information
International Astronomical Union Colloquium , Volume 93: Cataclysmic Variables: Recent Multi-Frequency Observations and Theoretical Developments , 1987 , pp. 127 - 134
Copyright
Copyright © Reidel 1987

Footnotes

*

Based on observations made at the European Southern Observatory, La Silla, Chile

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