An Updated 2017 Astrometric Solution for Betelgeuse

@article{Harper2017AnU2,
  title={An Updated 2017 Astrometric Solution for Betelgeuse},
  author={Graham M. Harper and A. Brown and Edward F. Guinan and Eamon O’Gorman and Anita M. S. Richards and Pierre Kervella and Leen Decin},
  journal={The Astronomical Journal},
  year={2017},
  volume={154},
  pages={11}
}
We provide an update for the astrometric solution for the Type II supernova progenitor Betelgeuse using the revised Hipparcos Intermediate Astrometric Data (HIAD) of van Leeuwen, combined with existing VLA and new e-MERLIN and ALMA positions. The 2007 Hipparcos refined abscissa measurements required the addition of so-called Cosmic Noise of 2.4 mas to find an acceptable 5-parameter stochastic solution. We find that a measure of radio Cosmic Noise should also be included for the radio positions… 

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