A Chandra Search for Coronal X Rays from the Cool White Dwarf GD 356

@article{CWeisskopf2007ACS,
  title={A Chandra Search for Coronal X Rays from the Cool White Dwarf GD 356},
  author={Martin C.Weisskopf and Kinwah Wu and Virginia Trimble and Stephen L. O’Dell and Ronald F. Elsner and Vyacheslav E. Zavlin and Chryssa Kouveliotou},
  journal={The Astrophysical Journal},
  year={2007},
  volume={657},
  pages={1026-1036}
}
We report observations with the Chandra X-ray Observatory of the single, cool, magnetic white dwarf GD 356. For consistent comparison with other X-ray observations of single white dwarfs, we also re-analyzed archival ROSAT dataforGD356(GJ1205),G99-47(GR290=V1201Ori),GD90,G195-19(EG250=GJ339.1),andWD2316+123, andarchivalChandradataforLHS1038(GJ1004)andGD358(V777Her).OurChandraobservationdetectedno X-rays from GD 356, setting the most restrictive upper limit to the X-ray luminosity from any cool… 
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