SW UMa and V426 Oph: EXOSAT surprises
Abstract
EXOSAT results on the dwarf nova SW UMa and the nova-like V426 Oph earmark these objects as unusual cataclysmic variables (CV). SW UMa is a strong soft (0.07 to 0.21 keV) source for its faint optical magnitude (V = 16.5), but shows no evidence for a harder (greater than 10 keV) component. The soft component is modulated at the orbital period (82 min) with the peak emission at phase 0.3, coincident with optical and spectroscopic modulations. V426 Oph is a strong medium energy source (30 keV) and shows a modulation at a one hour timescale during its 6 hour orbit, implying a possible DQ Her type system.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- 1988
- Bibcode:
- 1988STIN...8826269S
- Keywords:
-
- Cataclysmic Variables;
- Dwarf Novae;
- Exosat Satellite;
- Spaceborne Astronomy;
- X Ray Astronomy;
- Stellar Magnitude;
- Stellar Rotation;
- Astronomy