CORONAL X-RAYS FROM SINGLE, MAGNETIC WHITE-DWARFS - A SEARCH AND PROBABLE DETECTION

@article{Arnaud1992CORONALXF,
  title={CORONAL X-RAYS FROM SINGLE, MAGNETIC WHITE-DWARFS - A SEARCH AND PROBABLE DETECTION},
  author={K. Arnaud and V. V. Zhelezniakov and V. Trimble},
  journal={Publications of the Astronomical Society of the Pacific},
  year={1992},
  volume={104},
  pages={239-241}
}
We have searched for X-ray emission from a sample of five nearby (6-2 pc), strongly magnetic (10-200 MG), relatively cool (6000-14000 K), single white dwarfs, two of which may possess coronae. We detect one star (GR 290) at better than 99% confidence and give upper limits from Einstein Observatory IPC data for 4 others. The detected flux and limits are in the range of 1.4 - 12.5 X 1027 erg s-1. 
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