WD 1145+017: optical activity during 2016-2017 and limits on the X-ray flux

  title={WD 1145+017: optical activity during 2016-2017 and limits on the X-ray flux},
  author={Saul A. Rappaport and Bruce L. Gary and Andrew M. Vanderburg and S. Xu and David Pooley and Koji Mukai},
  journal={Monthly Notices of the Royal Astronomical Society},
WD 1145+017 was observed from 2016 November through 2017 June for the purpose of further characterizing the transit behavior of the dusty debris clouds orbiting this white dwarf. The optical observations were carried out with a small ground-based telescope run by an amateur astronomer, and covered 53 different nights over the 8-month interval. We have found that the optical activity has increased to the highest level observed since its discovery with Kepler K2, with approximately 17% of the… 

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