EUV and FUV observations of cataclysmic variables

Astronomy and Astrophysics – Astronomy

Scientific paper

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Cataclysmic Variables, Ultraviolet Astronomy, Ultraviolet Spectra, Voyager 2 Spacecraft, Extreme Ultraviolet Radiation, Far Ultraviolet Radiation, Light Curve, Radiant Flux Density, Stellar Spectra

Scientific paper

The authors present recent results from a continuing investigation of cataclysmic variables in the 500 to 1700 Å region with the Voyager ultraviolet spectrometers. Observations of outbursts show a substantial delay (≡0.5 day) in the rise to maximum in the FUV (912-1200 Å) with respect to optical wavelengths. Both FUV and optial light decline simultaneously. Flux distributions show a significant flattening in the FUV and with the possible exception of CPD -48°1577 no EUV flux has been observed in any cataclysmic variable. CPD -48°1577 shows a marginal, 2σ, EUV flux.

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