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Analysis of IUE data on V426 Ophiuchi - Outburst and orbital variabilityTime-resolved IUE spectra throughout two orbits of the dwarf nova V426 Oph during quiescence are presented. It is found that the visual and C IV fluxes remain relatively constant during both orbits, whereas the UV coninua and Mg II lines vary by 20-30 percent. The time scales of this variability are discussed. Analysis of other spectra at brighter optical magnitudes shows that the UV lags the optical during a probable rise to outburst, similar to the behavior of SS Cyg. The reddening of V426 Oph is determined to be E(B-V) = 0.1. The contribution of the white dwarf to the UV flux at quiescence is estimated to be 25 percent, based on the system parameters of Hessman (1988) and the period-temperature relation of Sion (1987).
Document ID
19890027070
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Szkody, Paula
(Washington, University Seattle, United States)
Mateo, Mario
(Mount Wilson and Las Campanas Observatories Pasadena, CA, United States)
Date Acquired
August 14, 2013
Publication Date
September 1, 1988
Publication Information
Publication: Astronomical Society of the Pacific, Publications
Volume: 100
ISSN: 0004-6280
Subject Category
Astronomy
Accession Number
89A14441
Funding Number(s)
CONTRACT_GRANT: NSG-5395
Distribution Limits
Public
Copyright
Other

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